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Science STAAR
Well its my science vocab(:
14
Science
8th Grade
04/22/2013

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Term
ATOMIC MASS
Definition
The mass an atom equal to the number of protons and neutrons.
Term
ATOMIC NUMBER
Definition
The number of protons in the atoms of a particular element that is unique only to that element.
Term
CHEMICAL CHANGE
Definition
The reaction between substances that resultsin new substances with different properties.
Term
COMPOUND
Definition
A comboination of two or more types of matter that retain their own individual properties.
Term
ELECTRON SHELLS
Definition
A collection of orbitals around the nucleus each having its own energy level.
Term
ELECTRON
Definition
A subatomic particle that has almost no mass and a negitive charge.
Term
ELEMENT
Definition
A pure substance containing only one type of atom.
Term
MIXTURE
Definition
A chemical substance made up of two or more kinds of atoms bonded together.
Term
NEUTRON
Definition
A neutral suatomic particle located in the nucleus.
Term
NUCLEUS
Definition
The center of an atom that contains the proton and neutrons and hasa positive charge.
Term
ORGANIC COMPOUNDS
Definition
A compound containing a chain of carbon atoms bound with other elements such as hydrogen and oxygen.
Term
PROTON
Definition
A positively charged subatomic particle located in the nucleus and has an atomic mass of 1.
Term
REACTIVITY
Definition
The tendency of an element to react with other elements to produce compounds.
Term
VALENCE ELECTRONS
Definition
The number of negatively charged particles in the most outer shell.
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