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15 cards from this deck
Protons, neutrons, and electrons
Protons and neutrons packed tightly together
In shells/energy levels around the nucleus
+1 (positive)
0 (no charge, electrically neutral)
-1 (negative)
1 atomic mass unit each
The number of protons
Equal numbers of protons and electrons balance out
1×10−101 \times 10^{-10}1×10−10 m
1×10−151 \times 10^{-15}1×10−15 m
About 100,000 times smaller
Over 99%
Gains energy and jumps to higher energy level
Loses energy and drops to lower energy level
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