Question

(a) How do alkaline earth metals occur in nature ?

(b) Write the electronic configuration of the first two alkaline earth metals.

Answer 1

(a) and:- Alkaline earth metals are greyish white in colour and harder than the alkali metals.

(b) and:- The electronic configuration of the first two alkaline earth metals are-

i) Beryllium (Be): $1s^{2}2s^2$
K shell = 2,
L shell = 2.

ii) Magnesium (Mg): $1s^{2}2s^{2}2p^{6}3s^2$
K shell =2,
L shell = 8,
M shell = 2.

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