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Transcript of A.P.E.M.A.N.
Atomic Number =
# of Protons = # of Electrons
Protons are Subatomic Particles in Atoms giving the Atom a Positive Charge. They are in the Nucleus and contribute to the Atomic Mass.
Use It !
If Your Wondering...
How many protons and electrons an atom has ?
(Don't know why you would wonder that...)
But if you are...
Look at the atomic number...
Oh look it's atomic number is 5,
If Boron's atomic number is 5, then that must mean its original number of protons and electrons are 5.
5 Protons, 5 Electrons.
M- Mass ( Atomic Mass )
A- Atomic Number
Why Do I Need This ?
To Find The Number Of Neutrons In an Element Of Course.
Mass - Atomic Number=
Number of Neutrons
The Neutrons, Are Never Even Touched Or Changed In Anyway.
So, You're Wondering Whats the Number Of Neutrons In This Atom Of Boron?
Well, Since The Atomic Mass Is 10.81,
You Would Round 10.81 To 11.
And Subtract That By The Atomic Number
So 11- 5
Or the Atomic Mass - the Atomic Number
It's 6. Because 11-5=6.
Everyone always forgets to round.