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Science Vocab - Atoms
Atoms, Elements, and Compounds
12
Science
6th Grade
01/27/2016

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Term
COMPOUND
Definition
A substance formed of the atoms of two or more elements
Term
ELECTRON
Definition
A negatively charged subatomic particle
Term
GAS
Definition
A state of matter that has no definite shape or volume
Term
ATOM
Definition
The smallest unit of a pure substance that still has the properties of that substance
Term
LIQUID
Definition
A state of matter that has a definite volume but no definite shape
Term
ACID
Definition
A compound that reacts easily with other substances and turns blue litmus paper red, has a pH lower than 7
Term
NEUTRON
Definition
A subatomic particle that has the same mass as a proton but no electric charge
Term
SOLID
Definition
A state of matter that has definite shape and volume
Term
ATOMIC NUMBER
Definition
The number of protons in an atom
Term
PROTON
Definition
A subatomic particle that has a positive electric charge
Term
BASE
Definition
A compound that reacts easily with other substances and turns red litmus paper blue, has a pH higher than 7.
Term
NUCLEUS
Definition
The center of an atom, which contains protons and neutrons
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