The nuclear model of the atom

Question 1

Protons, electrons and neutrons

Answer 1

Three basic particles that make up atom. Protons +ve charge, electrons -ve charge, neutrons have a neutral charge, Electrons are smaller than protons and neutrons, neutrons and protons are almost same size.

Question 2

Nuclear Notation

Answer 2

AX A = protons + neutrons = mass number Z = atomic number = protons X = element symbol
Z