Download Atomic Structure Worksheet Refer to your periodic table to fill in the

Atomic Structure Worksheet
Refer to your periodic table to fill in the table.
Name: ____________________________________
The periodic table can give you a great deal of information about the
composition of an atom.
• The atomic number is equal to the number of protons.
• The atomic mass is equal to the number of protons plus
neutrons.
• In a neutral atom, the number of protons is equal to the number
of electrons.
• When an atom is in a charged state (ion) the charge indicates
the imbalance between protons and electrons.
• Too many electrons and the charge is negative.
• Too few electrons and the charge is positive.
EXAMPLE
O-2
Explanation:
Mass # = 16 Protons = atomic #
Atomic # = 8
Neutrons=atomic mass –atomic #
8 protons, 8 neutrons,
10 electrons (8+2)
Electrons = charge (+/-) proton #
Complete the following chart.
Element/ion Atomic # Mass #
Li
Ba+2
Al+3
F-1
Br
Ru+3
Cr+2
S-2
Si
C
P+3
Ca+2
C
Fe
Na+1
7
137
27
19
80
101
52
32
28
12
31
40
14
56
23
# of
protons
# of
neutrons
# of
electrons
Element/ion Atomic #
Mass #
Pb
Mg+2
Hg
Ag
N-3
P
H+1
H-1
H
Cu
Mn
Be+2
Br-1
Au
U
210
24
201
108
14
33
1
1
3
64
55
10
80
197
240
# of
protons
#of
neutrons
# of
electrons
Try to name the atoms listed above (30):
When you are given an ion how do you figure out how many electrons
it has? Explain your method of figuring this out.
What is an isotope?
How do you know an atom is an isotope?
Which atoms from the table are isotopes?