Who proposed the atomic theory stating that matter is made up of indivisible atoms?

Which subatomic particle has a negative charge?

What is the central part of an atom called?

Who discovered the electron using the cathode ray experiment?

Which model of the atom describes electrons in fixed orbits around the nucleus?

What is the relative mass of a proton?

Which subatomic particle determines the identity of an element?

Who discovered the nucleus through the gold foil experiment?

The mass number of an atom is equal to the number of what?

What is the charge of a neutron?

Isotopes differ in the number of which subatomic particle?

Which element is used as the standard for relative atomic mass?

What is the approximate mass of an electron compared to a proton?

Who proposed the plum pudding model of the atom?

The atomic number of an element represents the number of what?

Which subatomic particle orbits around the nucleus?

The discovery of the neutron is credited to whom?

What term describes atoms of the same element with different numbers of neutrons?

What is the charge on the atomic nucleus?

The smallest particle of an element that retains its properties is called what?