what do you understand by group and periods?
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The vertical columns in periodic table are known as group. They are 18 in number..while the horizontal rows are known as periods..the y are 7 in number..
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The periodic table is the arrangement of the elements inorder of their atomic numbers so that the elements with similar properties appear at the same vertical columns or GROUPS
while Periods are arran in order of their electronic shells having one electron in outermost shell having completely filled outer shell which ends with zero element. THIS WILL SURE HELP YOU
while Periods are arran in order of their electronic shells having one electron in outermost shell having completely filled outer shell which ends with zero element. THIS WILL SURE HELP YOU
so what the ans. is precise
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