Combined ScienceCode 5129
The nuclear model of the atom
What this topic asks you to be able to do
- Outline how an atom is built, with a positively charged nucleus at the centre and negatively charged electrons moving in orbits around it
- Outline what the nucleus is made of, using protons and neutrons
- Define (a) proton number/atomic number, Z and (b) nucleon number/mass number, A, and work out how many neutrons a nucleus holds
- Explain the meaning of isotope, and state that an element can possess more than one isotope