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Elements and States of Matter Vocab
Vocabulary for First Quiz 1/6/12
19
Science
12th Grade
01/05/2012

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Cards

Term
Matter
Definition
stuff that everything is made of
Term
Elements
Definition

Everything is made up of smaller stuff called _______.

 

A substance that cannot be broken down into simpler substances by chemical or physical means.

Term
Chemical Symbol
Definition
1, 2, or 3 letter abbreviation for an element.
Term
Atoms
Definition
the smallest particle of an element that has all the characteristics of that element.
Term
Protons
Definition
a tiny particle that has a positive electrical charge.
Term
Neutrons
Definition

a particle that is the same size as a proton with no electrical charge.

 

(neutral charge)

Term
Electron
Definition
a particle much smaller than a proton with a negative electrical charge.
Term
Nucleus
Definition
the center of the atom made up of neutrons and protons.
Term
Valence Electrons
Definition
electrons that orbit the nucleus of the atom.
Term
Diamater of a Proton
Definition

2 x 10^-14

 

0.00000000000002 m

 

Term
Diameter of electron
Definition

2 x 10^-19

 

0.0000000000000000001 m

Term
Molecule
Definition
two or more atoms held together by sharing electrons
Term
Solid
Definition

substance with densely packed particles.

 

*definite shape and volume

Term
Melting Point
Definition
temperature at which a solid turns into a liquid
Term
Liquid
Definition
substance that takes on the shape of its container, but has no definite volume.
Term
Boiling Point
Definition
the temperature at which a liquid turns into a gas.
Term
Gas
Definition
a substance that takes on the shape and volume of its container.
Term
Sublimation
Definition
when a solid changes right to a gas
Term
Boiling Point of Water
Definition
212 degrees farenheit
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