Explanation:
No. Isotopes are atoms of the same element with different atomic masses (due to the different number of neutrons)
For example, carbon exists as carbon-12 and carbon-14, which both have 6 protons but have 6 and 8 neutrons respectively.
#1 B
#2 C
#3 B
#4 A.
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The reactant of a chemical reaction is one of the two or more substances in a chemical reaction. This image should help:
Answer: 44
Explanation:Please see attachment for explanation.