Question

What will be the numbers of electrons in Al^3 and Cl^-

Answer 1

Answer:

→ (i) Al³⁺

We know that,

Atomic number of Aluminium (Al) = 13

It contains,

Protons = 13

Electrons = 13

According to the question,

Calculate the number of electrons in Al³⁺

Al³⁺ means Aluminium donates (or) loses 3 electrons

Therefore,

The number of electrons in Al³⁺

$\rm \implies 13 - 3 = 10$

Hence,

Al³⁺ contains 10 electrons

Similarly ,

→ (ii) Cl⁻

We know that,

Atomic number of Chlorine (Cl) = 17

It contains,

Protons = 17

Electrons = 17

According to the question,

Calculate the number of electrons in Cl⁻

Cl⁻ means Chlorine has received (or) gained 1 electron

Therefore,

The number of electrons in Cl⁻

$\rm \implies 17 +1 = 18$

Hence,

Cl⁻ contains 18 electrons