Flash Cards Structure Of Atom Page 2
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1
2In column 17
Where are the
Halogens?
They all have 7 electrons in
the outer shell
In column 18
They don’t like to react
Where are the
with other elements
Noble Gases?
They all have 8 electrons in
the outer shell
(Helium has 2)
Equals the average number
of protons plus the number
Atomic Mass
of neutrons found in the
nucleus of the atom
BIG
The
number in front
of the compound; tells you
Coefficient
how many molecules of the
compound;
Everything after is
multiplied by that number
The
number just to the
LITTLE
bottom-right of an element (O
);
Subscript
2
tells how many atoms of that
element there are. Only what is
right before the number is
multiplied by that number.
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