Which of the following statements is CORRECT? i. the mass number is equal to the total number of protons and electrons in an atom. ii. the atomic number is equal to the number of protons in an atom. iii. the number of electrons in an atom is equal to the total number of protons and neutrons in the nucleus.

a

i only

b

ii only

c

iii only

d

i and ii only

e

ii and iii only

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Discussions (4)

mustapha2010
2 months ago

the answer should be D

Amandaafese
5 years ago

The ans should be d because those two points are valid

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