Question

The symbol of Na represents the shorthand notation of element:
(a) nitrogen
(b) nickel
(c) sodium
(d) potassium

Answer 1

Hint: The element which represents the symbol Na belongs to the s-block elements and is an alkali metal and is present in the second period of the periodic table. Recall the period table and then you can easily find the element having the symbol as Na.

Complete step by step answer:
By the shorthand notation of the element ,we simply the symbolic representation of that very element and in the periodic table we can see that first there is shorthand notation of the symbol and then below the symbol the element name is written.
We can find the element with the symbol Na from the periodic table given below as:
From the periodic table it is very clear that the element having the symbol Na is having the atomic number as 11 and we know that the element is sodium. Sodium is an alkali metal belonging to the s-block elements (also called as the representative elements and their outer electronic configuration is $n{{s}^{0-1}}$) and having the atomic number as 11 and the molecular mass(atomic mass) as 23. The general electronic configuration of sodium metal is $1{{s}^{2}}2{{s}^{2}}{{p}^{6}}3{{s}^{1}}$ .

Hence, option(c) is correct.

Note: Sodium is a very soft element and it is so soft that it can be easily cut with a knife and being an alkali , is a metal and helps in the conduction of electricity and thus, it is a good conductor of heat and electricity.