tiffanynicole1999 tiffanynicole1999

06-04-2018
Chemistry

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Which symbol correctly represents an element (D) whose atoms contain 15 protons and 20 neutrons?

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olabisioladime olabisioladime

06-04-2018

35/15 D.
A numeric in the upper left corner of chemical symbol stated for the atomic mass. The atomic mass is almost equal to a sum of protons and neutrons because electrons are not weighted much.

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30-10-2018

35/15D i took the test

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