Question

The atomic number of an element ‘X’ is 19. (a) Write its electronic configuration. (b) To which period of the Modern Periodic Table does it belong and what is its valency ? (c) If ‘X’ burns in oxygen to form its oxide, what will be its nature — acidic, basic or neutral ? (d) Write balanced chemical equation for the reaction when this oxide is dissolved in water.

Answer 1

a] potassium
b] 4 th period , valency= 1
c]basic
d] I don't know plz let me know if you have found out.

Answer 2

here x equals to potassium
a)electronic configuration:- 4s1
b)It belongs to period 4 of Modern periodic table, and it's valency is 1,-1
c)when potassium burns with oxygen and it liberated hydrogen and , the resulting alkaline solution turns red litmus to blue which means it's a base.