Which subatomic particle was discovered by J.J. Thomson?

What is the term for two or more different atomic nuclei with the same mass number but different atomic numbers?

Who proposed the nuclear model of the atom based on the gold foil experiment?

Which term describes elements with the same number of protons but different numbers of neutrons?

Which scientist proposed that electrons orbit the nucleus in fixed energy levels?

What is the name of the smallest unit of a compound that retains its chemical properties?

What did John Dalton propose about atoms?

Which term refers to an atom's tendency to attract shared electrons in a bond?

What is the term for a positively charged ion?

What is electron affinity?

What is the term for a negatively charged ion?