invisible gaseous substance surrounding the earth
air
colorless liquid
water
a burning substance that gives out heat, smoke, and light
fire
the planet we live on
earth
smallest component of an element
atom
positively charged element
proton
element that has a negative charge
electron
element that has no charge
neutron
colorless flammable gas (symbol H)
hydrogen
gaseous element present in the suns atmosphere (symbol He)
helium
positively charged mass within an atom.
nucleus
indefinite shape
mass
process that occurs within an atom
subatomic
propelled or driven by atomic energy
atomic
extremely small constituents of matter
particles
unit for measuring the number of molecules in a substance
mole
group of electrons revolving around the nucleus of an atom
electron cloud
relative atomic mass
atomic weight
part of a molecule consisting of series of atoms connected in a line
chain
a very small unit of matter that the particles of an atom consist of
quark