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Science Elements- & atoms

20 elements & atom definitions.. hope this helps
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H
hydrogen
He
helium
Li
lithium
Be
Beryllium
B
Boron
C
carbon
N
nitrogen
o
oxygen
F
fluorine
Ne
neon
NA
sodium
mg
magnesium
A
aluminum
si
silicon
P
phosphorus
S
sulfur
Cl
chlorine
Ar
argon
atom
the smallest particle of an element that still has the properties of the element
atomic mass
the average mass of the element's atoms ; the total number of protons and neutrons in the atom
atomic nucleus
dense center of the atom where the protons and neutrons are located
atomic number
the number of protons : the identification number of the atom
compound
a substance made from 2 or more elements whose atoms have been chemically bonded together
electron
the negatively charged subatomic particle ; orbits the nucleus
electron-cloud model
the most current model of how the electrons move around the nucleus
element
substances that CANNOT be broken down into other substances
compound
a substance made from 2 or more elements whose atoms have been chemically bonded together
molecule
the smallest part of a compound that has the properties of that compound
neutron
the neutral subatomic particle; found in the nucleus
outer shell
the location of the electrons that are involoved in bonding
*every atom's goal in life is to have a full outer shell
neutron
the neutral subatomic particle found in the nucleus
periodic table
a table of the elements arranged by atomic number and grouped by similar properties
proton
the positivity charged subatomic particle ; found in the nucleus in the nucleus of the atom
malleable
able to be pressed into thin sheets
*aluminum
ductile
able to be stretched into wire
alloy
a solid mixture of atoms