Measurment & Matter

Atomic Number

• A unique number for each atom based on the number of protons in the nucleus.

• The total number of neutrons in an atom's nucleus.

• The number of electrons in a neutral atom.

• The mass of an atom measured in atomic mass units.

Mass

• The amount of matter in an object.

• The weight of an object in a vacuum.

• The volume of an object measured in liters.

• The density of an object calculated by mass divided by volume.

Physical Property

• A quality of matter which is observed and measured without changing matter’s identity.

• A characteristic that can only be observed during a chemical reaction.

• A property that describes how a substance reacts with other substances.

• A measurement of the amount of matter in an object.

Liter

• A unit of measurement that represents the amount of space a substance takes up.

• A type of liquid measurement used in cooking.

• A measure of weight for solid substances.

• A unit of distance measurement.

Electron

• Positive subatomic particles found in the nucleus of an atom.

• Neutral subatomic particles found in the nucleus of an atom.

• Negative subatomic particles found orbiting the nucleus of an atom.

• Particles that do not have any charge and are found in the electron cloud.

Electron Cloud

• The area outside of the central mass of an atom which contains subatomic particles.

• The dense center of an atom where protons and neutrons are located.

• A region in an atom where electrons are fixed in place.

• The space between atoms in a molecule.

Neutron

• Positively charged particles found in the nucleus of an atom.

• Neutral subatomic particles found in the nucleus of an atom.

• Negatively charged particles that orbit the nucleus of an atom.

• Particles that are responsible for the chemical properties of an atom.

Nucleus

• The central mass of an atom which contains other subatomic particles.

• The outer shell of an atom where electrons are found.

• A type of particle that orbits the nucleus of an atom.

• The smallest unit of an element that retains its properties.

Chemical Property

• A characteristic of matter which describes matter’s ability to change or interact with different types of matter.

• A measure of the amount of matter in an object.

• The physical state of matter at a given temperature and pressure.

• The ability of matter to conduct electricity.

Protons

• Negative subatomic particle found in the nucleus of an atom.

• Neutral subatomic particle found in the nucleus of an atom.

• Positive subatomic particle found in the nucleus of an atom.

• Positive subatomic particle found outside the nucleus of an atom.