Question

The electronic configuration of metal A is 28.1 and that of metal B is 2, 8, 2 which of the
two metais is more reactive? Identify these metals. Write their reaction with dilute
hydrochloric acid​

Answer 1

Answer:

metal A is more reactive

A is sodium

B is magnesium

Explanation:

Na plus HCl will give NaCl and H2

Mg plus HCl will give MgCl2 and H2

Answer 2

Answer:

Metal A is Sodium (Na) :- 2,8,1

Metal B is Magnesium (Mg) :- 2, 8, 2

Metal A is more reactive than metal B

Reaction:-

Sodium metal reacts violently with dilute hydrochloric acid to form sodium chlorides and hydrogen.

2Na(a) + 2HCl(aq)→ 2NaCl(aq) + H2(g)

And Magnesium reacts less vigorously to form magnesium chloride and hydrogen.

Mg + 2HCl → MgCl2 + H2

Hope it helped you.