Answer:
Number of electrons differ from one elements to other elements .means that each elements have different numbers of electrons
for ex Hydrogen has only one electron whereas helium has 2 electrons
Number of electrons = Atomic number
Atomic number of an element tells the no. of electrons in it.
For ex
Hydrogen ( atomic no. 1 ) ---- 1 electron
helium ( atomic no 2 ) ---- 2 electron
Lithium (atomic no.3 ) ---- 3 electron
