alleryStart learning →Atomic mass of an element equals:
ANumber of protons in the standard view
BNumber of neutrons
CNumber of protons + neutrons
DNumber of electrons
Answer & Solution
Correct answer: C. Number of protons + neutrons
1. The atomic mass is the average mass of an atom.
2. Nearly all the mass sits in protons and neutrons.
3. Electrons are too light to count.
4. So atomic mass = protons + neutrons.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 5 'The Periodic Table'_
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