Groups in the periodic table are
vertical columns of elements
O horizontal rows of elements
Symbols of the elements
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A modern version, the so-called “long form” of the Periodic Table of the elements is the most convenient and widely used.
The horizontal rows ( which Mendeleev called series) are called periods and the vertical columns, groups.
Option A is correct.
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1
Answer:
Groups in the periodic table are
vertical columns of elements
O horizontal rows of elements
Symbols of the elements
The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups.
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