Question

Name the following

1. A metal with three shells and two valence electrons

2. An inert gas with two shells

3. A metalloid with two shells

4. A non metal with one shell

5. An element with the same number of electrons as that of oxide ion

Answer 1

(1). Magnesium metal has 2 shells and 2 valence electrons.(2,8,2)

(2). Neon is an inert gas with 2 shells (2,8).

(3). Boron is the metalloid containing 2 shells (2,3).

(4). Hydrogen is a non-metal with one shell (K=1).

(5). Oxide ion contains 10 electrons (2,8). Neon also contains 10 electrons.