brennabananas7431 brennabananas7431
  • 03-10-2017
  • Chemistry
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If the atomic number of an element is 9 and the mass number is 19, how many neutrons does the atom have?

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Аноним Аноним
  • 05-10-2017
To find the number of neutrons.....

NEUTRONS = MASS NUMBER - ATOMIC NUMBER ( PROTONS)

NEUTRONS  =  19  -  9 

So this element has 10 neutrons
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