What is the definition of matter?

• A solid substance only

• A collection of atoms only

• Something that has mass and occupies space

• A type of energy

Which of the following is NOT a state of matter?

• Solid

• Gas

• Plasma

• Liquid

Who proposed that matter is made up of atoms?

• John Dalton

• Niels Bohr

• J.J. Thomson

• Ernest Rutherford

What particle did J.J. Thomson discover?

• Neutron

• Nucleus

• Electron

• Proton

What is the center of an atom called?

• Electron cloud

• Nucleus

• Orbital

• Shell

What is the charge of a neutron?

• Positive

• Variable

• Neutral

• Negative

How many electrons can the first shell of an atom hold?

• 32

• 2

• 8

• 18

What is an isotope?

• Atoms that are chemically identical

• Atoms of the same element with different numbers of neutrons

• Atoms of different elements with the same mass

• Atoms of the same element with different numbers of protons

What is the relative atomic mass of an element based on?

• The number of protons only

• The number of neutrons only

• The total number of electrons

• The natural abundance of its isotopes

Which of the following elements has 13 protons?

• Oxygen

• Aluminum

• Silicon

• Carbon