Question

The mass of Na which will contain atoms is:
(A) 23 g
(B) 46 g
(C) 6.023 g
(D) 11.5 g

Answer 1

Hint: Sodium is a metal belonging to s-block in the periodic table. The atomic number of sodium is 11. It belongs to the IA group.
One mole of any element contains Avogadro number of atoms. Avogadro number is equal to atoms.

Complete step by step answer:
We know that one moles of each substance contains Avogadro's number of atoms.
Avogadro number atoms.
The mass of sodium is 23 grams.
23 grams of sodium is equal to 1 mole of sodium.
Means 23 grams of sodium contains atoms.
Therefore the mass of Na which will contain atoms is equal to 23 g.

So, the correct option is A.

Additional information:
- Liquid Sodium is used in nuclear reactors as a heat exchanger.
- In chemistry it is used as a reagent in so many chemical reactions.
- Sodium salts have more applications than the metal itself.
- Sodium chloride (table salt) is the most common salt of sodium. It is used at the time of cooking food and used to remove ice on the roads in winter in foreign countries.

Note: Don’t be confused with one mole of a substance and Avogadro number. Both have some inter relationship.
One mole of all compounds contains Avogadro number of atoms.
Sodium is used in streetlights in the form of vapor and sodium vapor produces a brilliant yellow color light when fixed in street lights.