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Sagot :
Answer:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Answer:
people
tee hee
but really they have the same number of valence electrons. Also they have similar chemical properties.
Explanation:
Hope this helped boo, lemme know if you need more info :)
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