Question

If an atom has an atomic mass of 19 and an atomic number of 9, how many protons, neutrons and electrons does it have?

Answer 1

protons = 9

neutrons = 10

electrons = 9 because it is neutral atom

Step-by-step explanation:

atomic number= protons = 9

atomic mass= protons + neutrons

19= 9 + n

n= 10