Atom Worksheet
Notes
The Atom - Building Block of all matter.
1) Structure
a) Nucleus (Core) particles
i) Neutrons
(1) No Charge
(2) Strongly Bound to Protons
ii) Protons
(1) Positively Charged
(2) Number Identifies the element
(3) Strongly bound to Neutrons
b) Orbiting particles
i) Electrons
(1) Negatively Charged
(2) Farther out from nucleus, weaker the bond
ii) Multiple orbits dependent on number of electrons
(1) Outside orbit – valence shell
(2) Fewer than 4 electrons in valence shell = conductor
2) Types
a) Balanced
i) Equal number of Protons and Electrons
ii) Zero Charge
b) Unbalanced
i) Negatively Charged Ion - More Electrons than Protons
ii) Positively Charged Ion - More Protons than Electrons
Atoms Worksheet :Question Sheet
1. What are the three main particles of an atom?
2. What are the charges of each one of these particles?
3. What is the center of an atom called?
4. What is the charge of the center of an atom?
5. What makes up the center of the atom?
6. What orbits the center of an atom?
7. Like charges (i.e. + and +) do what?
8. What is the electron configuration for the first 3 shell or orbits in an atom?
9. How many particles of the part that orbits the nucleus is on the shell closet to the
center of the atom?
10. Draw a Bohr model of the atom for Hydrogen?
11. What is the atomic number of an atom?
12. Can 2 different elements have the same atomic number?
13. What is mercury's atomic number?
14. How many protons does Mercury have?
15. What element has one less proton than mercury?
16. What makes up the atomic weight of an atom?
17. What is the atomic weight of gold?
18. How many neutrons does gold have?
19. How many electrons does a neutral gold atom have?
20. Why is the atomic weight on the periodic table never a whole number?
21. What is an isotope?
22. How can an atom have a negative charge?
23. How can an atom have a positive charge?
24. How can an atom have a neutral charge?
25. Does the number of protons for Carbon ever change?
Atom Worksheet
Materials
 Per pair of students:
2 “Classification of Matter” activity sheets
red, green, and blue colored pencils
1 set of bead samples (see note)

Note: Preparation of bead samples
Materials required: red, green, blue, and pearl beads; 180 small (60mm
size) plastic petri dishes, super glue, fine copper or craft wire, 20
quart-sized zipper bags.
For one complete sample set, fill nine petri dishes and label the lids as
described in the table below. A Sharpie works well for the label, and a
piece of clear tape over the writing will make the label more
permanent. Use a dab of super glue to affix the lids securely.
Dish label
R
Dish contents
Red beads only
B
Blue beads only
Gn2
Green beads, wired in pairs
BGn2P
Several pieces, each consisting of one
blue bead, two green beads, and a pearl
wired together
Several pieces, each consisting of a
pearl wired to a green bead
Several pieces, each consisting of four
red beads wired to a green bead
Some green beads wired in pairs, as
well as several pieces consisting of a red
bead wired to a green bead
Loose red beads, loose pearls, and green
beads wired in pairs
Loose red beads and blue beads
PGn
R4Gn
RGn + Gn2
R + P + Gn2
B+R
Classification
Pure substance,
element
Pure substance,
element
Pure substance,
diatomic element
Pure substance,
compound
Pure substance,
compound
Pure substance,
compound
mixture
mixture
mixture
Make 20 complete sets and store them in quart-sized zipper bags to have a class
set ready to go.
Safety
 Remind students that lab materials are to be used ONLY as directed
 No opening of Petri dishes
 Return any loose beads to the teacher
Name _______________
Date _____________
Reading Comprehension Worksheet
Compound & Elements
The 100 plus elements are the "alphabet" of matter because every tangible
material is a combinations of these elements.
The elements are categorized as: Metals, Non-Metals, Metalloids, Noble Gases
This main categorization is based on the electrical attributes of the elements.
Some elements tend to "lose" an electron, and become postively charged.
(These are the metals), Other elements tend to "acquire" an electron, and
become negatively charged, (the non metals). The third group, (metalloids), fall
in between these two extremes. And the Noble Gas category is "unelectrical" -displays no interest in either acquiring and losing an electron, but unlike the
metalloids who can be "persuaded" one way or the other -- the noble ones simply
don't engage.
Since chemical reaction and chemical bonding are electrical in nature, it so
happens that members of a certain category can substitute for another member
and thereby create a combination which is slightly different, but generally similar.
Say then that by carefully chosing a replacement element in a chemical
compound, it is possible to "engineer" a desired slight change in the nature of the
compound. This used to be the art, and now is the science of chemistry.
1. Which elements are likely to lose
electrons?
2. Which elements are likely to gain
electrons?
_________________________________
_________________________________
_________________________________
_________________________________
3. Which type of elements are likely
to have no electical charge at all?
_________________________________
_________________________________
_________________________________
4. How does knowing a great deal
about the property of certain
elements help us as humans?
_________________________________
_________________________________
Name _______________
Date _____________
Compounds and Elements Word Chop
Worksheet
Directions: The table below contains words that have been chopped in half. Find the pieces
that fit together and write them in the answer area below.
ture
sym
mole
ment
rons
comp
ound
sity
prot
bol
ele
den
trons
mix
neut
ume
rons
cule
elec
vol
Answers:
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
________________________
Name _______________
Date _____________
Elements & Compounds Word Search Worksheet
Directions: All words are positioned left to right, right to left, and diagonally.
E P B F
O D S V B B C I
O P D K J
L U V F
U S
G L P S P
L M N U H R J V U Y H F
Y O V M E O I
B A J
Q C Q N C V O W
H O Q E L E M E N T H R T Y
B B L U T Y J Y T I
J
D P H S M M I
C W B Y L X O L R C T F F L
V L R M D L G A R O K P
X O C O W U I
O L R I
K U J
M T E P L E H S
W R Q O Z S Q O
G G M L M E U U W A H G V S T
P S Y D S
E X N X E A C Z H T Z I
X R K N L L
V L P U J
D G I
V Y F K O V
S
L Z R M X K O S
Z B G V D Q O G Q U U W I
D G E S
V T M F C K
Q N Y W Y Q H K W C L M T N A G W D I
J
B Y W P
S S K Y
C U N Q E C O M P O U N D S J
B E Z
M G V I
P
B Y U O L U W S G Q W K H N V F A Q
D U C J
J
S O O E O Z S
R Q Q S
A N A F R M Z Q T R W A Q Y D O E J
O L N E U T R O N S J
Q Q A J
D V S
K X E E G T N V
R R R H P
Y G J H X L C O I
Q N L U M K B K H H B S
I
Q
L B J X F K K
E L E C T R O N S A
I
F
I
ELEMENT
MOLECULE
MIXTURE
DENSITY
NEUTRONS
PROTONS
SYMBOL
ELECTRONS
VOLUME
B D X D L T Y
COMPOUND
Name _______________
Date _____________
Chemical Maze Worksheet
Directions:
Guide the liquids to the flasks.
Elements and Compounds Vocabulary Quiz
Directions: Match the vocabulary words on the left with the definitions on the right.
1. volume
something that represents something else, esp. a material
sign or object that stands for a complex or abstract
concept:
2. element
made up of two or more parts or elements.
3. symbol
the product of mixing two or more items or substances
together.
4. mixture
the state or condition of being dense.
5. molecule
a single atom or several atoms bound together
electomagnetically, forming the smallest particle that
possesses all the characteristic physical and chemical
properties of an element or compound.
6. compound
a negatively charged particle, considered a fundamental
unit of matter, that exists independently or outside the
nucleus of an atom.
7. neutron
a collection of pages of writing or print bound together;
book.
8. electron
an elementary particle having no charge, spin of one-half,
and mass approximately equal to a proton, present in the
nucleus of all atoms except the common isotope of
hydrogen.
9. density
a part of any whole.
Element Symbols
Directions: Give the symbol for each of the named elements below.
Element
a. lithium
b. potassium
c. carbon
d. silver
e. sulfur
f. fluorine
g. nitrogen
h. oxygen
i. boron
j. hydrogen
k. helium
l. sodium
Symbol