Question

Which one of the following elements has its electronic configuration K2 , L8 & M2 ?
a) Calcium (Ca) b) magnesium (Mg)
c) neon (Ne)
d) sodium (Na)​

Answer 1

Answer:

b) magnesium (Mg)

Explanation:

Magnesium, Mg has atomic number is 12 and its belong to group number is 2 and period 3 . We know that the group represents the outermost shell electron number and period represent shell number.

By Aaditya Singh

Answer 2

Hey ur answer is option b magnesium (Mg)
U total up the numbers given to find out the total number of electrons . So by doing this u get 2+8+2=12
And atomic number 12 is that of magnesium

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