PHYSICS HIGH SCHOOL

To find the number of neutrons in an atom, you would subtractA.) mass number from atomic number
B.) atomic number from mass number
C.) atomic number from electron number
D.) isotope number from atomic number

Answers

Answer 1
Answer:

To find the number of neutrons in an atom, what we must do is to follow the following steps:

1) Find the element in the periodic table.

2) Find the atomic number of the element. The atomic number is the number of protons of a single atom of that element.

3) Find the atomic weight of the element.

4) Finally, we look for the number of neutrons. For this, we follow the following relationship:

Atomic weight - number of protons = number of neutrons.

Answer:

To find the number of neutrons in an atom, you would subtract:

B.) atomic number from mass number
Answer 2
Answer:

Option B is the correct answer, because the number of neutron is equal to the difference between the mass number and atomic number.

Further explain:

Before going about the calculation of the number of neutron in an atom, firstly we will know something about an atom.

An atom is a fundamental unit of matter. It is composed of nucleus and electrons orbiting around the nucleus.

The electrons in an atom are orbiting around the nucleus in the shells of different energies.

Maximum part of the mass of an atom is concentrated in its nucleus and it is composed of proton and neutron. They are also known as nucleons of an atom.

Proton and electron are the charge particles. Proton carries the positive charge while electron carries the negative charge of same amount, but neutron does not carry any type of charge so it is neutral.

The total number of electron is equal to the total number of proton is an atom.

That’s why atoms are neutral in nature.

Atomic number: The total number of electron or total number of proton in an atom is known as the atomic number.

{A_n}=P

   

Here, {A_n}  is the atomic number and P  is the number of proton.

Atomic mass: The sum of number of proton and neutron in an atom is known as atomic mass or mass number.

So, atomic mass can be calculated as,

\boxed{M = P + N}

   

Here, M  is the atomic mass or mass number and  N is the number of neutron .

So, number of neutron can be calculated as,

\boxed{N = M - P}

   

So, number of neutron is equal to the difference between the mass number and number of proton or atomic number.

Learn more:

1. Water is a compound: brainly.com/question/4636675.

2. Acceleration of the box against the friction: brainly.com/question/7031524.

3. Example of energy brainly.com/question/1062501.

Answer detail:

Grade: High school

Subject: Chemistry

Chapter: Atom

Keyword:

Number of neutron, mass number, proton, electron, atomic number, atom, nucleus, difference, atomic mass, subtraction, orbit, neutral.

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Answers

No the electron is a negative.

The proton is the positive.

Hope this helps!
no it is negative a proton is postive

How much energy ( in joules ) is released when 0.06 kilograms of mercury is condensed to a liquid at the same temperature ? A. 697.08 J
B. 17,705.1 J
C. 20,075.04 J
D. 51,302.88 J

Please include how you got your answer , thank you.

Answers

Answer:

B. 17,705.1 J

Explanation:

The hear released when the mercury condenses into a liquid is given by:

Q=m \lambda_v

where

m = 0.06 kg is the mass of the mercury

\lambda_v is the latent heat of vaporization

For mercury, the latent heat of vaporization is \lambda_v = 296 kJ/kg, so the heat released during the process is:

Q=(0.06 kg)(296 kJ/kg)=17.76 kJ = 17,760 J

So, the closest option is

B. 17,705.1 J

The energy ( in joules ) released when 0.06 kilograms ofmercury is condensed to a liquid at the same temperature is about 697.08 J. inother to solve this problem, should know the latent heat of fusion of mercurywhich is equal to about 11.4 kJ/kg and multiplying by mass of mercury.

Part C Next, you’ll test the hardness of each rock by scratching it with different substances as shown in the chart. The values in the chart are based on the Mohs Scale of hardness, which ranks the hardness of rocks and minerals on a scale of 1 to 10. First try to scratch a rock with your fingernail. If you can make a mark on the rock with your fingernail, record the related hardness value from the chart in your table. If a fingernail doesn’t scratch the rock, try to scratch it with the copper penny. If the penny doesn’t scratch the rock, try the wire nail and finally the masonry nail. Enter a hardness value for each rock.

Answers

Answer + Explanation:

To determine the hardness value of each rock, you need to follow the instructions provided and test the rocks with different substances. Here is a step-by-step guide:

1. Start by scratching the rock with your fingernail. If your fingernail can make a mark on the rock, record the related hardness value from the chart in your table. For example, if your fingernail scratches the rock and the corresponding hardness value in the chart is 2, you would record 2 in your table.

2. If your fingernail doesn't scratch the rock, move on to the next substance, which is a copper penny. Try scratching the rock with the copper penny. If the penny doesn't scratch the rock, move on to the next substance.

3. The next substance to try is a wire nail. Scratch the rock with the wire nail. If the wire nail doesn't scratch the rock, proceed to the last substance.

4. The last substance to try is a masonry nail. Scratch the rock with the masonry nail. If the masonry nail doesn't scratch the rock, record the highest value from the chart in your table.

By following these steps and recording the highest hardness value achieved through the scratching test with each substance, you will be able to determine the hardness value of each rock.

hope this helps

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Answers

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Answers

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Answers

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