Answer:
10
Explanation:
the capacity for each shell for the first 20 elements can be given by
2.8.8.2
2 electrons in the first shell
8 in the 2nd and in the 3rd
and 2 in the 4th
so if both the first and 2nd shells are full,
2+8=10 electrons
Answer:
10 is the total number of electrons present in that atom.
Explanation:
The formula for total number of electron in nth shell is given by :[tex]2n^2[/tex]
First shell = 1
Number of electron in first shell,n = 1:
= [tex]2(1)^2= 2[/tex]
Number of electron in first shell,n = 2:
= [tex]2(2)^2= 8[/tex]
Total number of electrons in the atom with full first shell and second shell:
2 + 8 = 10
