Question

2. An atom of an element has electronic configuration
2, 8, 1. Which of the following statement is
correct?
(1) The valency of element is 7
(2) The element exists as a triatomic molecule
(3) The element is metalloid
(4) The element forms basic oxide​

Answer 1

Answer:

its atomic number is 11

Answer 2

Answer:

the answer is (4)

Explanation:

as 2, 8, 1 is the atomic number of sodium(Na) which forms basic oxides