Q:

Some atoms of iodine, I, contain 53 protons and 78 neutrons in their nuclei. A correct symbol for these atoms would be:

0

Some atoms of iodine, I, contain 53 protons and 78 neutrons in their nuclei. A

correct symbol for these atoms would be:


  1. 53 131I
  2. 53 78I
  3. 78 131I
  4. 78 53I

All Answers

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A: the convention is: the number of protons is the subscript; the sum

of the number of protons and neutrons (131) is the superscript.

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