Homework Help: chemistry

Posted by bob on Monday, December 12, 2011 at 7:23pm.

Atom X has atomic mass (A) = 40 and atomic number (Z) = 20. Atom Y has A = 42 and Z = 20. How are these two atoms related?

chemistry - bobpursley, Monday, December 12, 2011 at 7:24pm
They are isotopes of element 20

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