Question

The electronic configuration of an element is given below.

1s22s22p63s1

Which statement about the reactivity of the element is true?

A. It is reactive because it has a full outermost energy level.
B. It is unreactive because it has a full outermost energy level.
C. It is reactive because it has to lose one electron to have a full outermost energy level.
D. It is unreactive because it has to gain one electron to have a full outermost energy level.

Answer 1

C. It is reactive because it has to lose one electron to have a full outermost energy level.

Answer 2

The statement which is true about the reactivity of element with 1S²2S²2P⁶3S¹ is

it is reactive because it has to lose one electron to have a full outermost energy level.

Step-by-step explanation

• Element with 1S²2S²2P⁶3S¹ electron configuration is a sodium metal.

• sodium has one electron in the outermost energy level.

• for sodium to have a full outermost energy level ( 8 electrons) it loses the 1 electron in 3S¹ to form a positively charged ion. (Na⁺)