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August 30, 2015

Homework Help: Chemistry

Posted by timmy123 on Saturday, October 16, 2010 at 4:47pm.

Atom A- 6 protons, 6 electrons, 7 neutrons
Atom D- 6 protons, 6 electrons, 8 neutrons
Atom X- 7 protons, 7 electrons, 8 neutrons
Atom Z- 8 protons, 8 electrons, 9 neutrons

Which two atoms are isotopes of the same element?

a. A and D
b. A and Z
c. X and D
d. X and Z

How am I supposed to figure this out?

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