Vocab Review

What is Physical Change?

A change in matter from one form to another without a change in chemical properties. This change affects one or more physical properties of a substance such as shape, state, volume, or mass.

A change that occurs when one or more substances change into entirely new substances with new properties.

What is Chemical Change?

A change in matter from one form to another without a change in chemical properties. This change affects one or more physical properties of a substance such as shape, state, volume, or mass.

A change that occurs when one or more substances change into entirely new substances with new properties.

What is Matter?

Anything that has mass and takes up space. Matter can exist as a solid, liquid, or gas.

The ability of a substance to dissolve in another substance.

What is Solubility?

The ability of a substance to dissolve in another substance.

Anything that has mass and takes up space. Matter can exist as a solid, liquid, or gas.

What is Ductility?

The ability to be stretched into a thin wire (copper wire).

The ability to be hammered into a sheet (aluminum foil).

What is Malleability?

The ability to be hammered into a sheet (aluminum foil).

The ability for electricity or heat to pass through a substance (metals only!).

What is Conductivity?

The ability of a substance to dissolve in another substance.

The ability for electricity or heat to pass through a substance (metals only!).

What is Semiconductor?

metalloids having the ability to conduct electrical current but not at the same rate as metals.

The ability to be hammered into a sheet (aluminum foil).

What is Precipitate?

A solid created during a chemical reaction.

The ability for electricity or heat to pass through a substance (metals only!).

What is Freezing Point?

The ability for electricity or heat to pass through a substance (metals only!).

The temperature at which a solid changes to a liquid at a given pressure.

What is Boiling Point?

The temperature at which a solid changes to a liquid at a given pressure.

The temperature at which a liquid changes into a gas at a given pressure.

What is Atom?

Subatomic particle with a positive charge and located in the nucleus of the atom. The number of protons gives the atom its identity.

The smallest unit of matter that retains the identity of the substance.

What is Proton?

The smallest unit of matter that retains the identity of the substance.

Subatomic particle with a positive charge and located in the nucleus of the atom. The number of protons gives the atom its identity.

What is Neutron?

Subatomic particle with no charge, the same mass as a proton, and located in the nucleus of the atom.

The smallest unit of matter that retains the identity of the substance.

What is Electron?

Subatomic particle with no charge, the same mass as a proton, and located in the nucleus of the atom.

subatomic particle with a negative charge and located outside the nucleus.

What is Valence Electrons?

The electrons in the last shell or energy level of an atom.

subatomic particle with a negative charge and located outside the nucleus.

What is Atomic Number?

The number of protons in the nucleus of an atom. This number identifies the atom.

subatomic particle with a negative charge and located outside the nucleus.

What is Atomic Mass?

The number of protons in the nucleus of an atom. This number identifies the atom.

The average mass number of all isotopes of an atom The number of protons and neutrons in the nucleus of an atom.

What is Specific Heat?

Is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions.

The amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius.

What is Compound?

A mixture of two or more substances that can be separated by physical means such as evaporation or straining.

Is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions.

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