Question

Name an element which has the same number of electrons in its first and second shell.

Answer 1

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TᕼE ᗩᑎᔕᗯEᖇ Iᔕ " Bྂeྂrྂyྂlྂlྂiྂuྂmྂ "

the beryllium contains 4 electrons so it's electronic configuration becomes..

1s(2) , 2s(2)

so 2 electrons are present in both the 1st and 2nd shell

Answer 2

Dear Student,

◆ Answer -

Beryllium (Be)

● Explanation -

• Before starting to fill second shell, first shell must be completely filled with electrons.
• First shell can have maximum of two electrons.
• For electrons to be same in both shells, second shell should also have two electrons.
• So now total electrons will be : 2 + 2 = 4 e-.
• Element with 4 e- in its ground state is Beryllium (Be).

Thanks dear. Hope this helps you...