E-PolyLearning

536. The number of proton, neutron and electron in sulfide ion is respectively
a. 16,17 and 18
b. 17,16 and 18
c. 18,17 and 16
d. 18,16 and 17
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Answer: (a).16,17 and 18

537. The number of electrons (e⁻) are always equal to number of protons(p⁺) in a
a. neutral atom
b. positive ion
c. negative ion
d. isotope
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Answer: (a).neutral atom

538. The atoms of element convert into ions upon being
a. distilled
b. vaporized
c. solidified
d. condensed
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Answer: (b).vaporized

539. Relative atomic mass for chlorine is
a. 35.7
b. 35.6
c. 3.56
d. 35.5
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Answer: (d).35.5

540. The mole of a substance is the relative atomic mass or relative molecular mass in terms of
a. milligrams
b. grams
c. kilograms
d. micrograms
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Answer: (b).grams