Question

b. Two elements X and Y have 6 and 7 electrons in their Nand M shells respectively. Find
the ratio of atomic numbers of x and y
a)3:4
b)2:1
c)1:2
d)6:7​

Answer 1

the answer is d)6:7

Hope it helps

Answer 2

Answer:

no the answer will be 2:1

Explanation:

X element is having 6 electrons in N-shell means K, L, M shells are completely filled with electrons and in N-shell is with 6 electrons.

So, as we know that K-shell accommodates 2 electrons, L-shell accommodates 8 electrons, M-shell accommodates 18 electrons and N-shell is having 6 electrons (2+8+18+6 = 34).

Y element is having 7 electrons in M shell means K, L shells are completely filled with electrons and M shell is having 7 electrons.

So, as we know that K shell accommodates 2 electrons L shell accommodates 8 electrons and M shell is having 7 electrons. (2+8+7 = 17)

The number of electrons is equal to number of protons in a neutral atom. So, element X is having atomic number 34, Y element is having atomic number 17.

so the ratio is 34:17 or 2:1