Question

2. Which one of the following is metal?
a. C. b.N. c. Na. d. O​

Answer 1

Answer:

c) Na (Sodium)

Explanation:

Carbon, nitrogen and oxygen are non metals with valency of 4, 3, and 2 electrons respectively.

Sodium is a metal with a valency of 1 electron.

Answer 2

Na is a metal. Correct option is option(c).

• Metals are those compounds that have 1,2 or3 valence electrons and can easily donate valence electrons to become stable.
• Carbon has four valnce elctrons. Hence, it is not metal.
• Nitrogen has five electrons in its valence shell. Hence, it is also not metal.
• Sodium has one electron and it can easily give one electron to become stable. So it is a metal.
• Oxygen has 6 valence electrons so it is also not metal.