Question

give the following is suitable word.
a. the number of protons present in the nucleus of an atom.
b. the sum of the number of protons and neutrons of an atom.
c. atoms of same element with same atomic number but a different mass number .
d. the smallest unit of an element which takes part in the chemical reaction.​

Answer 1

Answer:

a)atomic no

b) mass no

c) Isotope

d) atom

Explanation:

( definations are given in book if u need to know the reason)