Name ___________________________
Table _____ Period _____ SCORE: _______/30
Describe atoms
The circle below represents the nucleus of an atom. Draw 2 protons
in the nucleus. Show the + charge in the protons.
Vocabulary Review
After completing the other side of this page, come back and
write in the correct term for each definition. There is a word
bank at the bottom to help you.
_____________
_____________
_____________
_____________
If the atom has 2 protons, how many neutrons will it probably have?
______ Add them to your nucleus. (Atoms may have a different
number of neutrons. The various forms of an element with differing
numbers of neutrons are called ________________________.)
_____________
Draw a much larger circle around your nucleus. This represents the
electron orbit. If your atoms has 2 protons, how many electrons
does it need? _______ Draw them onto the electron orbit you just
drew. Label your electrons with a negative charge.
_____________
The atom you just drew is helium.
If you had a different number of protons, it would be a different
element. If you had 2 protons, but a different number of neutrons, it
would still be helium, but it would be an _____________________
of helium.
_____________
_____________
WORD BANK: Not all are used.
(atomic mass)
Name _______________________________
Period _____ Table _____
Use the Periodic Table
1. The Periodic Table is a tool
that organizes elements to help
you understand them.
COLUMNS in the Periodic
Table represent groups or
f _ _ _ _ _ _ _ . Elements in
the same family have similar
properties.
ROWS on the chart are
called p _ _ _ _ _ _.. The
elements in a period have
very different properties.
Number your periods 1-7
from the top.
4. Let’s look at some families in the Periodic table. Color them different colors.
A______
B____
C_____
N______
Metals
Family
Family
Family
*1 valence electron
*soft, shiny, silverwhite metals
*never found pure
*most reactive
metals
*3 valence
electrons
*4 VE
*Can gain 4
e-, lose 4 e-, or share e*Most compounds in body
contain C
*Si 2nd most abundant
element in Earth’s crust
*5 VE
*Tend to gain 3 e*N and P used in fertilizers
*P on tips of matches
2. Important information
about an element is given in
each square of the table.
Atomic #
(# of protons)
Symbol
Name
Atomic Weight
(protons + neutrons)
What does the
Periodic Table
tell you about
aluminum?
Symbol: ____________
Atomic Weight _______
Atomic Number _______
# of protons __________
3. Valence electrons
are the electrons in an
elements outer energy
level, and are
responsible for many of
an element’s properties.
Elements in the same
family have the same
number of valence
electrons, and so are
similar. All atoms
want full outer
energy levels, usually
8 valence electrons.
To get that, they will
react with other
elements to:
l _ _ _ electrons
g _ _ _ electrons, or
s _ _ _ _ electrons.
Notice that the first 3
periods have empty
spaces in the table.
That is because the
fist energy levels
hold fewer eletrons.
Alkaline
E _ _ _ _ Metals
*2 VE
*less reactive than alkali
metals
*often mixed with Al--forms
strong/light weight alloys
O_____
Family
*6 VE
*Tend to gain 2 e*O so abundant
that oxidation is
common..
Halogens
*7 VE
*most
active nonmetals
*never found pure in
nature
*react with alkali
metals to form salts
N _ _ _ _ /Inert
Gases
*non-reactive
*outermost e- shell is
full (8 VE)