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

Question

Messiah Terrell

Chemistry

20 March, 12:54

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

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Alvin · Answer 1

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.