How many Groups and periods in Mendeleev's periodic Table?
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It has seven periods and 18 groups
Anonymous:
not 18 in mendeelev
wrong answee
my or her
yaa yrr answer is 7 period and 8 groups
hmm right
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The periodic table is composed of seven horizontal rows or periods and is numbered between 1 to 7. There is a regular gradation in the properties of elements in the horizontal rows(periods) from left to right. The periodic table is composed of eight vertical columns or groups. They are numbered between 1 to 8.
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