How many protons are in the nucleus of an atom that has an atomic number of 23 and a mass number of 51? (answer quick please)
The atomic number is the number of protons, so this atom has 23 protons.
Complete the passage to describe how electrons are represented in electron dot diagrams. The maximum number of dots an electron dot diagram can have is( A:two, B:Four, C:Six, D:Eight) The maximum number of dots drawn on a side of a chemical symbol in an electron dot diagram is ( A:two, B:Four, C:Six, D:Eight)
The maximum number of dots an electron dot diagram can have is EIGHT.
The maximum number of dots drawn on a side of a chemical symbol in an electron dot diagram is TWO.
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The maximum number of dots an electron dot diagram can have is (D:Eight). The maximum number of dots drawn on a side of a chemical symbol in an electron dot diagram is (A:two)
A dot diagram is a representation of the number and arrangement of electrons in the outermost shell of an atom usually a pair of electrons at the four cardinal points around the symbol.By convention,
The maximum number of dots an electron dot diagram can have is (D:Eight)The maximum number of dots drawn on a side of a chemical symbol in an electron dot diagram is (A:two)Read more:
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What is the scientific term for rocks made in lava?
The answer is d. extrusive.
The other term for it is igneous rock. Igneous rock is made in lava, and another term for igneous rock is extrusive rock.
have a great day! Brainliest is greatly appreciated, and please let me know if you need help with anything else ;)
Answer:
The answer is Extrusive.
Explanation:
How I know is because I took the test and I got 100% this was one of the questions.
What is the final temperature of a 27.2-gram wooden block that starts at 23.4°C and loses 759 joules of energy? The specific heat capacity of wood is 1.716 joules/gram degree Celsius. Use the formula Q = mCΔT.
A. 7.1°C
B. 10.9°C
C. 16.3°C
D. 39.7°C
T = final temperature of the block
T₀ = initial temperature of the block = 23.4 °C
Q = energy lost from the wooden block = - 759 J
c = specific heat capacity of wood = 1.716 J/(g °C)
m = mass of the wooden block = 27.2 g
Heat lost from the block is given as
Q = m c (T - T₀)
inserting the values
- 759 = (27.2) (1.716) (T - 23.4)
T = 7.1 °C
The final temperature of a 27.2-gram wooden block is 7.1 °C. The correct option is A.
What is temperature?Temperature is the measurement of the hotness or coldness of the body. It is denoted by Kelvin.
By specific heat equation
[tex]Q = mc (T - T_\circ)[/tex]
where T = final temperature
T₀ is the initial temperature =23.4 °C
Q is lost energy from the block = - 759 J
c is specific heat = 1.716 joules/gram
m is the mass of the block = 27.2 g
Putting the values in the equation
[tex]\rm - 759 = (27.2) (1.716) (T - 23.4) = 7.1_\circ C[/tex]
Thus, the correct option is A is 7.1 °C.
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All matter is made up of atoms. Which sentence correctly describes atoms?
a
An atom is the smallest particle of an element.
b
Atoms are the smallest particle of a nucleus.
c
An atom is a substance that has been cut in half.
d
All substances are made of the same atoms.
An atom is the smallest unit of matter that retains all of the chemical properties of an element. Atoms are made up of smaller particles called subatomic particles, including protons, neutrons, and electrons. Different types of atoms correspond to the different elements on the periodic table.
Explanation:Among the options you provided, option 'a' most accurately describes an atom: An atom is the smallest particle of an element. Indeed, an atom is the smallest unit of matter that retains all of the chemical properties of its corresponding element. For example, one gold atom retains all of the properties of the element gold.
Atoms themselves are composed of even smaller particles called subatomic particles, including protons, neutrons, and electrons. These subatomic particles contribute to the atom's mass and unique properties. The number of protons and neutrons gives mass to the atom while the number and arrangement of electrons determine the element's properties.
It's also important to note that while all matter is made up of atoms, not all substances are made of the same atoms as suggested by option 'd'. Each type of atom corresponds to a specific element on the periodic table, and these different types of atoms can combine in various ways to form all the diverse substances we see in our universe.
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What is the name of the group of elements which has properties of both metals and nonmetals?
Alkaline earth metal
Alkali metal
Metalloids
Noble gases
PLease and thank you!
Answer:
Metalloids
Explanation:
You probably already know the names of some molecules. Identify which compound (water, salt, carbon dioxide, or methane) corresponds to each of the following chemical formulas. H2O is . CO2 is . NaCl is . CH4 is .
Explanation:
Water has a formula which represents two hydrogen atoms are attached to one oxygen atom. Therefore, the formula of water is [tex]H_{2}O[/tex].
Salt is also known as sodium chloride. Its formula represents that one sodium atom is attached to one chlorine atom, therefore, its formula is NaCl.
Carbon dioxide has a formula which represents one carbon atom is attached to two oxygen atoms. Therefore, its formula is [tex]CO_{2}[/tex].
Methane has a formula which represents one carbon atom is attached to four hydrogen atoms. Therefore, its formula is [tex]CH_{4}[/tex].
Thus, we can conclude that [tex]H_{2}O[/tex] is water, [tex]CO_{2}[/tex] is carbon dioxide, NaCl is salt, and [tex]CH_{4}[/tex] is methane.
The various compounds along with their corresponding formula would be as follows:
Water - [tex]H_2O[/tex]Salt - NaClCarbon dioxide - [tex]CO_2[/tex]Methane - [tex]CH_4[/tex].Water is made up of two atoms of hydrogen and an atom of oxygen bonded together as H2O.
Common salt consists of an atom each of sodium and chlorine bonded together as NaCl.
Carbon dioxide consists of an atom of carbon and two atoms of oxygen bonded together as CO2.
Methane consists of an atom of carbon and four atoms of hydrogen bonded together as CH4.
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Will give brainliest, points, and more!!
Please help me reword this, I really don't like how I wrote it but I can't think of anything else!
Many every day activities lead to global warming because they produce pollution. When gas is burned in a car, it produces carbon dioxide, a Greenhouse gas. It floats up towards the atmosphere, and becomes the atmosphere. This causes the hat from the sun to get trapped, bouncing from the earth to the atmosphere. The sun doesn't stop producing heat, so the world gets hotter, causing many changes in temperature each decade that goes by.
Do you relizes how many activities lead to global warming? When gas is burned in a car, it produces carbon dioxide (a green house gas). The carbon dioxide then floats up towards the atmosphere and becomes part of the atmosphere. This then causes the heat from the sun to get trapped, bouncing from the atmosphere to the earth. The sun will never stop producing heat which will only lead to the world getting hotter as each decade goes by.
Hope this helps you!
Many every day activities lead to global warming because they produce pollution. When gas is burned in a car, it produces carbon dioxide, a Greenhouse gas. It floats up towards the atmosphere, and makes holes in the atmosphere which lets in those harmful UV radiation and sometimes also adds more atmosphere which could turn earth into the next venous. This causes the heat from the sun to get trapped, bouncing from the earth to the atmosphere. The sun doesn't stop producing heat, so the world gets hotter, causing many changes in temperature each decade that goes by.
hope that helped
Which of the following best describes a person doing science? A. Dominick uses a computer to do his math homework. B. Lindsay measures the sizes of the craters on the Moon. C. Isabel invents a new kind of doorknob. D. Murray randomly predicts the result of a coin toss.
Answer:
B. Lindsay measures the sizes of the craters on the Moon.
Explanation:
Science is about making a hypothesis, doing experiments, making observations, recording data, analyzing data, interpretation of the data, and writing meaningful conclusion. Here Lindsay measures the sizes of the craters on the Moon, which falls under making observations and recording data so Lindsay is ding experiments.
Dominick is simply using technology, Murray is simply guessing a number and Isabel’s invention falls under engineering.
How much mass does 0.1 mole of neon contain
That would be 2 grams.
well the mass of 0.1 mole or 0.000000000001 centi
WILL GIVE BRAINLIEST
A potassium ion can combine with several monatomic and polyatomic ions to form compounds.
An example of a potassium compound containing both ionic and covalent bonds is (potassium chloride, potassium hydride, potassium nitrate, potassium oxide), and an example containing only ionic bonds is (potassium chloride, potassium hypochlorite, potassium sulfate, potassium sulfite).
For the first one, you have to find one that has both a metal and a nonmetal in it, plus potassium. Bonds between nonmetals are called covalent because they share electrons and a bond between a metal and a nonmetal is an ionic bond because they exchange electrons.
Potassium chloride is KCl. Only an ionic bond.
Potassium hydride is KH. Only an ionic bond.
Potassium nitrate is KNO3. There we go, that has a covalent bond between the nitrogen and oxygen, and an ionic bond between potassium and the nitrogen and oxygen.
For the second one, potassium chloride is the answer because the other three also have covalent bonds. Chloride is the only one that isn't a compound.
Answer:
Potassium Nitrate, Potassium Chloride
Explanation:
please help!
Typically _________ cannot be removed from the atom.
A) electrons
B) neutrons
C) protons
D) tachyons
The correct answer is option (C). Typically protons cannot be removed from the atom.
Protons, along with neutrons, are the subatomic particles that make up the nucleus of an atom. They are held together by the strong nuclear force, which is one of the four fundamental forces of nature. This force is so strong that it overcomes the electromagnetic repulsion between the positively charged protons. As a result, protons cannot be easily removed from the atom through typical chemical reactions or processes.
Electrons, on the other hand, are much less massive and are bound to the atom by the electromagnetic force, which is weaker than the strong nuclear force. Electrons can be removed or added to an atom during chemical reactions, a process that results in the formation of ions.
Neutrons are neutral particles found in the nucleus along with protons. While they are not electrically charged like protons, they still contribute to the mass of an atom and play a role in nuclear reactions. Similar to protons, neutrons are also held in the nucleus by the strong nuclear force and cannot be removed through chemical means.
Tachyons are hypothetical particles that are said to move faster than the speed of light. They are not part of the known structure of atoms and are not considered in the context of typical atomic or chemical processes.
Which substances will make a salt when combined? (2 points) Vinegar and antacids Soda and wine Soap and ammonia Fertilizer and detergent
vinegar and antacids.
the best way seperate salt fron wateris with the use of
A. oil.
b. rubbing alcohol
c. a magnet
d. heat
You can boil or evaporate the water and the salt will be left behind as a solid. If you want to collect the water, you can use distillation. This works because salt has a much higher boiling point than water. One way to separate salt and water at home is to boil the salt water in a pot with a lid. So, I would say maybe oil.
Which kingdom does a multicellular living organism most likely belong to? Animalia
Archaebacteria
Bacteria
Eukarya
They would be apart of the Eukarya kingdom
Answer:
Comprehensive Science FLVS right, I took the end module exam to. It is Eukarya
Explanation:
Which statements describe the six elements found in all living things? Check all that apply.
Carbon is the basis of all living things.
Sulfur is found in bones, where it provides strength.
Nitrogen is found in certain foods.
Oxygen and hydrogen combine with each other to form water.
Only carbon, hydrogen, and phosphorus are found in organic compounds.
Carbon, oxygen, hydrogen, nitrogen, phosphorus, and sulfur are found in organic compounds.
Answer:
oxygen, hydrogen, nitrogen, phosphorus, and sulfur
Explanation:
Oxygen and hydrogen
A piece of iron has a volume of 11.6 cm3 and a mass of 63.5g what is its density?
The density of an object, a fundamental principle in physics, is calculated by dividing its mass by its volume. In the case of the iron piece that has a mass of 63.5g and a volume of 11.6 cm3, its density is calculated to be 5.47 g/cm3.
Explanation:The density of an object is calculated by dividing its mass by its volume. This concept is a fundamental principle in physics. In this case, the piece of iron has a mass of 63.5g and a volume of 11.6 cm3. Thus, the density can be calculated using the formula density = mass/volume.
So, density = 63.5g / 11.6 cm3 = 5.47 g/cm3. Therefore, the density of the given piece of iron is 5.47 g/cm3.
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The Hawaiian Islands are home to many endangered species. Why do you think the Hawaii Department of Agriculture is so strict about allowing nonnative species onto the islands?
It is so strict because a foreign species could compete with a native species and drive it to extinction.
Which of the following is not a possible sublevel?
1p
2s
3d
4f
Answer is: 1p.
First energy level only have one sublevel 1s.
Second energy level has 2s and 2p, third has 3s, 3p and 3d and fourth has 4s, 4p, 4s and 4f.
Aufbau principle is a scheme used to reproduce the electron configurations of the ground states of atoms by successively filling subshells (orbitals) with electrons in a specific order.
Filling subshells in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f.
The following which is not a possible sublevel is 1p. Thus option 1 is correct.
What is electronic configuration?
Electronic configuration is defined as a symbolic representation of the manner in which the electrons of its atoms are distributed over different atomic nuclei.
It can also be defined as distribution of electrons around the nucleus.
The general electronic configuration is
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p.....
Sublevel is defined as a level that is lower than or subordinate to another level.
Thus, the following which is not a possible sublevel is 1p. Thus option 1 is correct.
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scientific notation in standard form
Take the number of the exponent and move the decimal that many places. If it is positive move it left and if it is negative move it right.
For Example:
2.57x10³= 2570
Fill in any access spaces with zero.
Taking that same number to the negative 3 power
2.57x10^-3
0.00257
I put a 0. to show it is a distinctive decimal.
Take the number of the exponent and move the decimal that many places. If it is positive move it left and if it is negative move it right.
For Example:
2.57x10³= 2570
Fill in any access spaces with zero.
Taking that same number to the negative 3 power
2.57x10^-3
0.00257
I put a 0. to show it is a distinctive decimal.
A atom neutral (one with 0 extra charge)?
______________________________________________________________________________
A +ion (positive ion, one with extra positive charge)? ______________________________________________________________________________
A - ion (negative ion, one with extra negative charge)?
A neutral atom has equal number of protons and electrons. A +ion or cation is an atom that has lost electrons, thus having a net positive charge. A -ion or anion is an atom that has gained electrons, resulting in a net negative charge.
Explanation:An atom is considered neutral when it has an equal number of protons and electrons. The protons carry a positive charge and the electrons carry an equal magnitude of negative charge, so when the numbers are equal, their charges cancel each other out, leading to a balanced, or 'neutral', overall charge.
A +ion, or cation, is an atom (or a molecule) that has lost one or more electrons. Since electrons have negative charge, the loss of electrons leads to an excess of positive charge, making the atom or molecule a positive ion.
Conversely, a -ion, or anion, is an atom (or a molecule) that has gained one or more electrons. Since electrons carry negative charge, the gaining of electrons leads to an excess of negative charge, making the atom or molecule a negative ion.
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HELP EM PLEASE
Which of the following is the energy stored in an object as a result of its vertical position or height?
Elastic potential energy
Gravitational potential energy
Kinetic energy
Thermal energy
Thermal energy hopefully I can help you next time
Answer:
Thermal energy i think
Explanation:
Describe erosion in your own words
Answer:
the action of becoming destroyed and removed via air, rain, or even other natural phenomena
Explanation:
What atom has 19 protons and 20 neutrons
Potassium Does! Hope that helps
Potassium has 19 protrons and 20 neutrons. We can easily tell this because on The Periodic Table, potassium (symbol "K") is number 19. Meaning it has 19 protons and 19 electrons.
what atom has 24 neutrons,and 45 mass
It is Scandium or Sc
Hope this is what you were looking for
Which theory did Pasteur disprove by using boiled beef broth and a flask with S-shaped tubing?
Answer:
Theory of spontaneous generation.
Explanation:
Spontaneous generation refers to an outdated body of thought on the ordinary formation of living organisms without descent from similar organisms. The theory of spontaneous generation held that living creatures could arise from nonliving matter and that such processes were common in place and regular
5 Uses of elements or its Compounds: Oxygen
fresh air for breathing
ability to sustane life
treat peoples breathing problem
energy in automobiles
industriel procces
Th volume of helium in a blimp is 6.28x10^9 millimeters. Thr density of helium is a blimp is 0.1786 meters. Find the massof the helijm blimp
The correct density of helium should be in [tex]\( \text{kg/m}^3 \)[/tex]. The calculated mass of helium in the blimp is approximately 1,121.908 kg.
The question asks us to find the mass of the helium in a blimp. To do this, we need to use the density of helium and the volume of the blimp.
However, the density provided in the question is not correctly stated because density should be mass per volume, usually given in grams per liter [tex](\( \text{g/L} \))[/tex] or kilograms per cubic meter [tex](\( \text{kg/m}^3 \))[/tex].
Assuming that the correct density of helium is 0.1786 [tex]\( \text{kg/m}^3 \)[/tex] (as would be common for a question of this nature), and the volume of the helium is given as [tex]\( 6.28 \times 10^9 \)[/tex] milliliters, we first need to convert the volume from milliliters to cubic meters to match the units of the density [tex](since \( 1 \) mL = \( 1 \times 10^{-6} \) \( \text{m}^3 \))[/tex].
First, convert the volume:
[tex]\( \text{Volume in cubic meters (m}^3\text{)} = 6.28 \times 10^9 \) mL \( \times 1 \times 10^{-6} \) \( \text{m}^3/\text{mL} \)\\ \( = 6.28 \times 10^3 \) \( \text{m}^3 \)[/tex]
Then calculate the mass: [tex]\( \text{Mass} = \text{Density} \times \text{Volume} = 0.1786 \) \( \text{kg/m}^3 \) \( \times 6.28 \times 10^3 \) \( \text{m}^3 \)[/tex]
[tex]\( \text{Mass of helium} = 1,121.908 \) kg[/tex]
The mass of helium in the blimp is approximately 1,121.908 kilograms.
When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 18 grams of water from 8 grams of methane and 32 grams of oxygen, how many grams of carbon dioxide were produced in the reaction?
When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 18 grams of water from 8 grams of methane and 32 grams of oxygen, how many grams of carbon dioxide were produced in the reaction?
Solution:
32 - 18 = 14
14 + 8 = 22
Answer:
22
The way metals surface reflects light is called