GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The periodic table has ____ groups and ____ periods
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18, 7
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14, 6
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12, 9
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11, 8
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Explanation:
Detailed explanation-1: -In the modern periodic table, there are 18 groups and 7 periods . Elements are arranged in rows and columns. The horizontal rows are known as periods while the vertical columns are known as groups.
Detailed explanation-2: -In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered.
Detailed explanation-3: -Group 17 elements are called halogens. Group 18 elements are called noble gases.
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