Question

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

Answer 1

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

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.