Mention main features of modern long form of periodic table
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hydrogen was fixed
place for isotopes and isobars is fixed
it is based on atomin number.
place for isotopes and isobars is fixed
it is based on atomin number.
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Answer: The main features of modern periodic table
Step-by-step explanation:
Elements are arranged in the increasing order of atomic numbers.
Elements in the modern periodic table are arranged in 7 periods and 18 groups.
Horizontal rows are called periods and vertical columns are called groups.
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