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Elements and Compounds


13. 

The chemical property of elements are related to their

Answer : D. valency

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14. 

The inner transition element among the following is

Answer : B. Lanthanam

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15. 

The only element which is NOT containing neutrons in its nucleus is

Answer : C. an isotope of hydrogen

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16. 

The element with the maximum number of isotopes in nature is

Answer : B. Tin

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17. 

Which one of the following is a transition element?

Answer : C. Copper

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18. 

Element which is an enemy of copper is

Answer : A. sulphur

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