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Matter
Atoms
Periodic Table
Molecules
100
Anything that takes up space and has weight.
What is matter?
100
Particles in an atom that have no charge.
What is a neutron?
100
Most of the world is made out of this element.
What is hydrogen?
100
The formula for water.
What is H2O?
200
Matter made of a single kind of atom.
What is an element?
200
Particles in an atom that have a positive charge.
What is a proton?
200

The symbol for helium.

What is the letters He?

200
Combination of letters and numbers used to represent a compound.
What is a formula?
300
Measure of how much matter is in an object.
What is mass?
300
Smaller particles that neutrons and protons are made of.
What are quarks?
300
The number of protons in the nucleus of an atom.
What is an atomic number?
300
An electron in the outer shell of an atom which can combine with other atoms to form molecules.
What is a valence electron?
400
Matter made up of two or more atoms.
What is a compound?
400
The center of an atom.
What is a nucleus?
400
Elements that are to the farthest right of the periodic table (group 18).
What is a noble gas?
400
Bond that holds elements together in molecules.
What is a chemical bond?
500
A form that matter takes.
What is a state?
500
What is the basic unit of every element?
What is an atom?
500
The mass of an atom of a chemical element.
What is atomic weight?
500
Compound made of more than one substance in which each substance keeps its original properties.
What is a mixture?