| 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
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| 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
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| 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
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| 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
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| 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
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