Question

An element having electronic configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ forms
(a) Acidic oxide (b) Basic oxide
(c) Amphoteric oxide (d) Neutral oxide

Answer 1

Explanation:

rhe answer is c as per the question

Answer 2

(b) Basic oxide

Explanation:

Electronic configuration  = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

Number of electrons = 19

Atomic Number = 19. So the element is Potassium, K.  

The oxides which react with water and produce alkali and can neutralize acids forming salt and water are called basic oxides.

Potassium oxide + water produces potassium hydroxide.

Potassium hydroxide reacts with sulfuric acid to form Potassium sulfate and water.

So Oxide of Potassium is basic.

Option B is the answer.