Nucleons

Q.

For chlorine, Z = 17, A = 35. Give the number of protons, electrons and neutrons in

(i) chlorine atom (ii) chloride ion.

In chlorine atom (Cl),

Number of protons (Z) = 17

Number of neutrons = A — Z = 35 — 17 = 18

Q.

If Z is the number of protons and A the number of nucleons, then the number of neutrons in an atom is given by

1. Z - A

2. 2 (A - Z)

3. A - Z

4. A + Z

Q.

An element Z consists of three types of atoms ${}_{22}{}^{11}\mathrm{Z},{}_{23}{}^{11}\mathrm{Z},{}_{24}{}^{11}\mathrm{Z}$. How many nucleons does each atom have?

Q.

Select the correct statement(s) regarding the electrical charge of electrons and protons.

1. Electrons are positively charged.

2. Electrons are negatively charged.

3. Protons are positively charged.

4. Protons are negatively charged.