Metal $A$ has electronic configuration of 2,8,1 and metal $B$ has 2,8,8,2 which is more reactive. The metal $A$ is:

M g

No worries! We‘ve got your back. Try BYJU‘S free classes today!

F e

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C u

No worries! We‘ve got your back. Try BYJU‘S free classes today!

N a

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D $N a$
Metal $A$ is sodium ( $N a$ ) : 2,8,1
Metal $B$ is calcium ( $C a$ ) : 2,8,8,2
Metal $A$ (sodium) is more reactive than metal $B$ (calcium).
Reaction :
i. Sodium metal reacts violently with dilute hydrochloric acid to form sodium chlorides and hydrogen.
$2 N a (s) + 2 H C l (a q) \to 2 N a C l (a q) + H_{2} (g)$

ii.Calcium reacts less vigorously to form calcium chloride and hydrogen.
$C a + 2 H C l \to C a C l_{2} + H_{2}$

Suggest Corrections

Similar questions

Metal A has electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive. Identify these metals and give their reactions with dil HCl.

Metal A has an electronic configuration of 2,8,1 and metal B has 2,8,8,2 which is a more reactive metal.

(a) Identify A and B and give their reactions with dil.HCl and dil. $H_{2} S O_{4}$ .

(b) Give the effect of heat on their:

(i) oxides, (ii) hydroxides,

(iii) carbonates, (iv) nitrates.

Metal

A

has electronic configuration of

2, 8, 1

and metal B has electronic configuration of

2, 8, 2

Identify these metals:

Q. Assertion: Sodium Metal is reactive where as Sodium Ions aren't reactive.

Reason: Sodium Metal has an electronic configuration of 2, 8, 1. Sodium Ions have a configuration of 2, 8.

Q. A metal 'M' has the electronic configuration 2, 8, 3 and occurs in nature as M

_{2}

_{4}

. It is more reactive than zinc. Name the metal 'M'.

Join BYJU'S Learning Program

Metal A has electronic configuration of 2,8,1 and metal B has 2,8,8,2 which is more reactive. The metal A is:

Metal $A$ has electronic configuration of 2,8,1 and metal $B$ has 2,8,8,2 which is more reactive. The metal $A$ is: