Subatomic Particles
Comparison of Particles
Name
Relative Mass
Charge
Location
Proton
1 amu
+ 1
nucleus
Electron
0
- 1
electron clouds
Neutron
1 amu
0
nucleus
Calculating the Number of Subatomic Particles
# protons = atomic number (Z)
# electron = number of protons (if neutral)
# neutrons = Mass number(A) - Atomic number (Z)
Complete this table
Atomic Number
Mass Number
Number of Protons
Number of Neutrons
Number of Electrons
Symbol
9
__
__
10
__
__
__
__
14
15
__
__
__
47
__
__
22
__
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