Calculate the number of electrons , protons and neutrons in (I ) phosphorus atom (ii ) phosphate ion mass number `= P=31 , O=16`
Atomic numbers `: P = 15 ,o =8 `

Explanation

( i) phoshorus atom
number of electron = number of protons = atomic number = 15 number of neutrons = Mass number - Atomic number
` =31-15=16`
(ii ) phoshate ion
number of electrons = `15+4xx8+3=50`
number of protons `= 15+4xx8=47`
Number of neutrons `= 16+4xx8=48`