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Atomic Structure
Phase Changes
Chemical vs Physical Changes
Vocabulary
Misc.
100
The center of an atom.
What is the nucleus?
100
The 3 phases of matter.
What is solid, liquid, and gas?
100
This is a change in chemical composition.
What is a chemical change?
100

This is considered to be the building block of all matter.

What is an atom?

100

This prefix means "different".

What is hetero-?

200
The neutrally charge part of an atom.
What is a neutron?
200
A substance in this phase will always have the same shape and volume.
What is a solid?
200
This is a change that does not result in the formation of a new substance.
What is a physical change?
200

This is a substance that is made of all like atoms.

What is an element?

200
Atoms bond together to form this.
What is a molecule?
300
The positively charged part of an atom.
What is a proton?
300
A substance in this phase will never have the same shape or volume.
What is a gas?
300
Rust is an example of this kind of change.
What is a chemical change?
300

This is a combination of substances that are not chemically bonded.

What is a mixture?

300

This is the combination of the protons and neutrons in the nucleus of an atom.

What is the atomic mass?

400
The only subatomic particle located outside of the nucleus.
What is an electron?
400
A substance in this phase takes the shape of it's container, but always takes up the same amount of space.
What is a liquid?
400

A sudden change in color or temperature indicates this has occurred.

What is chemical reaction?

400
This is a back and forth motion observed in all matter at the atomic level.
What is vibration?
400

As a substance changes from a solid to a liquid to a gas, the amount of thermal energy ______.

What is increases?

500
If we say that atoms typically have a neutral charge, the number protons _____ the number of electrons.
What is equal to?
500
This can also force a substance to change state (it is NOT heat).
What is pressure?
500
This is the kind of change a phase change is considered to be.
What is a physical change?
500

This is a molecule made up of 2 or more different elements.

What is a compound?

500

The amount of this subatomic particle, identifies the element. (Also known as the atomic number.)

What is the proton?