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Earn 100

The long form of periodic table consists of _____.
(a)Seven periods and eight groups
(b)Seven periods and eighteen groups
(c)Eight periods and eighteen groups
(d)Eighteen periods and eight groups

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Important Questions on Classification of Elements and Periodicity in Properties
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All the members in a group in long form of periodic table have the same _____.

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Which of the following properties generally decrease along a period?

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An element ’M' has an atomic number 9 and its atomic mass 19. The ion of M will be represented by _____.

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The element with the smallest size in group 13 is _____.

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The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all _____.

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The number of elements in the third period of the periodic table is _____.

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Which of these choices is not a family of elements?

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The element which has the least tendency to lose electron is _____.
