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3 years ago

It all adds up worksheet

Chemistry

1 answer:

Komok [63]3 years ago

8 0

Atomic number and the number of protons are the same...
Neutrons = Mass number - number of protons
Electrons are same # unless there is a charge
The whole number you see on the periodic table is the atomic number of the element which is also same as the number of protons

1) carbon - 14 ; Mass number = 14 , Protons = 6 , Neutrons = 14 - 6 = 8
  Electrons = 6

2) Lead - 208 ; Mass # = 208 , Protons = 82 , Neutrons = 208 - 82 = 126
  Electrons = 82

3) Uranium - 239 ; Mass # = 239  , Protons = 92,Neutrons = 239 - 92 = 147
Electrons =  92

4) Uranium - 238 ; Mass # = 238 , Protons = 92 , Neutrons = 238 - 92 = 146
Electrons = 92

5) Tin - 118 ; Mass # = 118 , Protons = 50 , Neutrons = 118 - 50 = 68
Electrons = 50

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