Question

An element ' X' has mass number 32 and atomic number 16.find (1) the number of neutrons in the atom of the element. (2) the number of electrons in the outermost shell of the atom

Answer 1

Mass no. = no. of protons and neutrons= 32.
Atomic no.= no. of electrons or no. of protons= 16
so no. of neutrons = 32-16 = 16 ........ we know that given element is having 16 electrons so, electronic configuration is 2,8,6
no. of electrons in last shell is 6