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April 19, 2014

Homework Help: chemistry

Posted by ray on Monday, December 12, 2011 at 8:19pm.

Isotopes (select one or more):
are chemicals that react only with protons.
for an element have the same chemical properties.
are atoms of an element that differ in the number of protons.
are atoms of an element that differ in the number of neutrons.
for an element are equal in frequency.

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