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Question
Mass number is ______.
Options
number of protons
number of electrons
number of protons + number of neutrons
none of the above
MCQ
Fill in the Blanks
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Solution
Mass number is number of protons + number of neutrons.
Explanation:
Almost 100% of an atom's weight resides inside its central core, which is calculated strictly as the sum of protons and neutrons.
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Chapter 1: Periodic Properties and Variations of Properties - Intext Question [Page 16]
