Question

The total no. Of electrons that can present in 4.6 g of sodium is..?

Answer 1

We know that One Mole of Sodium Weighs 23 Grams

One Mole of Sodium contains 6.023 × 10²³ Atoms of Sodium

⇒ 6.023 × 10²³ Atoms of Sodium weighs 23 grams

We need to find how many atoms does 4.6 grams of Sodium contains

4.6 grams of Sodium contains : (4.6 × 6.023 × 10²³)/23 = 1.2046 × 10²³ atoms

We know that Each Neutral Sodium atom contains 11 Electrons

⇒ Number of Electrons in 4.6 gram of Sodium = 1.2046 × 10²³ × 11

⇒ Number of Electrons in 4.6 gram of Sodium = 1.325 × 10²⁴

Answer 2

No. of atoms×12 is the no. of electrons
moles of sodium=given mass/molecular mass
=4.6/23=0.2moles
no. of atoms in 0. 2 moles =0. 2× 6.022×10^23
no. of electrons =
0.2×6.022×10^23×12
=14.45×10^23 (approximately