Question

Fill in the following blanks in respect of an atom of an element :

Number of protons	Number of neutrons	Mass number	Atomic number	Number of electron	Valency
11	12	_________	_________	_________	_________

Answer 1

No. of protons	No. of neutrons	Mass no.	Atomic no.	No. of electrons	Valency
11	12	23	11	11	1