Periodic Table has Groups and Periods
Groups are from 1 to 18 . Roman Groups are (I to VIII)
There are 7 periods in the periodic tables
Going from Left to right of periodic table:
What happens to the size of an atom: size decreases
Gong from Top to Bottom of periodic table:
What happens to the size of an atom: the atomic size increases
More reactive as it goes down
What about the reactivity of the atom: reactivity increases
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