Question

How do you know how many protons, neutrons and electrons are in each atom?

Answer 1

The answer is down below

Step-by-step explanation:

atom contains protons and neutrons which are in the nucleus and protons

number of proton =atomic number

mass number =P+N

where P=number of Protons

N=number of Neutrons

for an element to be electrically neutral

P=e‐

number of Protons equals number of elecrons