Subatomic Particles Worksheets
Vocabulary Skills:
1. Isotopes of the same elements have a different number of neutrons.
2. Particles called quarks are believed to make up all known subatomic particles in
an atom.
3. Atomic number = the number of protons
4. Mass of subatomic particles are measured in amu.
5. Electrons are arranged in energy levels with the lowest energy level found closest
to the nucleus.
6. Mass # is equal to the number of protons and neutrons.
Atomic mass is the average of all the naturally occurring isotopes.
7. Electron cloud is the space within an atom where electrons are most likely to be
found.
8. Isotopes of the same elements have different mass numbers.
Subatomic Particles:
Proton: nucleus, 1 amu, positive charge
Electron: energy levels, 0 amu, negative charge
Neutron: nucleus, 1 amu, neutral charge
Find the Missing Numbers:
Iron: 26,56,26,30,26
Sulfur: 16,32,16,16,16
Carbon: 6,12,6,6,6
Fluorine: 9,19,9,10,9
Calcium: 20,40,20,20,20
Nitrogen: 7,14,7,7,7
Copper: 29,64,29,35,29
Sodium: 11,23,11,12,11
Mercury: 80,201,80,121,80
Silver: 47,108,47,61,47
Atomic Structure:
H: 1,1.00794,1,1,0,1
H+: 1,1.00794,1,1,0,0
C: 6,12.011,12,6,6,6
Li+: 3,6.941,7,3,4,2
Cl-: 17,35.453,35,17,18,18
K: 19, 39.0983,39,19,20,19
Mg+2: 12,24.305,24,12,12,10
As-3: 33,74.9216,75,33,42,36
Ag: 47,107.868,108,47,61,47
Ag+: 47,107.868,108,47,61,46
S-2: 16,32.06,32,16,16,18
U: 92,238.029,238,92,146,92
Isotopes or different elements:
1. Different
2. Isotopes
3. Different
4. Isotopes
5. Isotopes
6. Different
7. Isotopes
Isotopes and Average Atomic Mass:
1.
2.
3.
4.
5.
6.
126.86 amu
197.5 amu
55.85 amu
1.012 amu
14.07 amu
12.04 amu