Question

The no. of electrons is equal to the no. of protons . So how can we say that an atom has charge it should be neutral?

Answer 1

Electrons have negatively charged and protons are positively charged.So, we know that the no. of electrons is equal to the no. of protons(But don't confuse an atom with an ion).
Therefore , in an atom the positive charges and the negative charges are equal in magnitude.Thus, an atom is neutral. But an ion is not neutral as it may have more or less than the normal no. of electrons.
Hope this helps you!!!

Answer 2

hi friend,
we all know that an atom consists of positively charged protons, negatively charged electrons and neutrons which do not carry any charge.
the neutrons and electrons are equal in magnitude.so in an atom they get nullified and hence atoms are said to be neutral. but in a chemical reaction while forming compound, these atoms either gain or lose electrons due to which they become imbalanced and carry a charge. in that case these atoms are known as ions.

for example Na is an atom of sodium which is neutral but Na+ is an ion of sodium where it has lost one electron.

hope it helped you and you understood.
plz let me know if anything is wrong.