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NAME _____________________________
PERIOD _____ DATE _________________
1. Fill in the chart below.
ATOMIC
SYMBOL
NUMBER
PRE-AP CHEMISTRY
CHAPTER 3
WORKSHEET 1
MASS
NUMBER
NUMBER OF
PROTONS
NUMBER OF
ELECTRONS
NUMBER OF
NEUTRONS
89
39
Y
33
195
78
75
Pt
23
28
31
15
2. What is the relationship between an atom that has 18 protons, 20 neutrons, and 18 electrons and one that has 18 protons, 21
neutrons, and 18 electrons?
3. Write the name and symbol for atoms with the following:
A. 16 protons, 16 electrons, 16 neutrons
B. 40 protons, 40 electrons and 54 neutrons
C. 78 protons, 78 electrons and 120 neutrons
NAME _____________________________
PERIOD _____ DATE _________________
1. Fill in the chart below.
ATOMIC
SYMBOL
NUMBER
PRE-AP CHEMISTRY
CHAPTER 3
WORKSHEET 1
MASS
NUMBER
NUMBER OF
PROTONS
NUMBER OF
ELECTRONS
NUMBER OF
NEUTRONS
89
39
Y
33
195
78
75
Pt
23
31
28
15
2. What is the relationship between an atom that has 18 protons, 20 neutrons, and 18 electrons and one that has 18 protons, 21
neutrons, and 18 electrons?
3. Write the name and symbol for atoms with the following:
a.
16 protons, 16 electrons, 16 neutrons
b.
40 protons, 40 electrons and 54 neutrons
c.
78 protons, 78 electrons and 120 neutrons
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