1
Q
element
A
a pure substance that cannot be split in to simpler substances
2
Q
compound
A
any substance that is formed by chemical combination of two or more elements and acts like a single substance
3
Q
atom
A
the smallest unit of an element that retains the properties of that element
4
Q
proton
A
a particle in the nucleus of an atom with one unit of postive electric charge
5
Q
neutron
A
a particle in the nucleus of an atom that has no net electric charge
6
Q
electron
A
a particle in the space outside the nucleus of an atom that carries an electric charge
7
Q
nucleus
A
an atoms dense center where most of it’s mass is
8
Q
molecule
A
a particle that contains more than one atom joined together
Science 5th grade
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