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A.P.E.M.A.N.

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by

Angela Ouellette

on 5 September 2014

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Transcript of A.P.E.M.A.N.

A.P.E
A-
Atomic Numer
P-
Protons
E-
Electrons
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.
Proton
Use It !
Example: Boron
5
B
Boron
10.86
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,
Remember A.P.E.
If Boron's atomic number is 5, then that must mean its original number of protons and electrons are 5.
5 Protons, 5 Electrons.
Easy.
A.P.E.
M.A.N.
M.A.N.
M- Mass ( Atomic Mass )
A- Atomic Number
N- Neutrons
Why Do I Need This ?
To Find The Number Of Neutrons In an Element Of Course.
How?
Like This...
M.A.N.
Mass - Atomic Number=
Number of Neutrons
Remember ?
M.A.N

M-Mass
A-Atomic Number
N- Neutrons
Remember...
The Neutrons, Are Never Even Touched Or Changed In Anyway.
Easy.
Examples ?
5
B
Boron
10.81
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
5
So 11- 5
Or the Atomic Mass - the Atomic Number
It's 6. Because 11-5=6.
Round
Everyone always forgets to round.
A.P.E.M.A.N.
Full transcript