How many protons, neutrons, and electrons are in each of the following atoms or ions?
Solution:
The number on the bottom left of the symbol is the atomic number which is equal to the number of protons.
The top number is the mass number which is equal to protons plus neutrons. To find neutrons, we need to subtract the atomic number from the mass number.
Each proton has a +1 charge and each electron has a -1 charge. If the charge is +2 that means there are two more protons than electrons.
a. 12 protons, 12 neutrons, 12 electrons
b. 12 protons, 12 neutrons, 10 electrons
c. 27 protons, 32 neutrons, 25 electrons
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