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serg [7]
3 years ago
7

PLEASE HELP! NO LINKS!!

Chemistry
1 answer:
Marina CMI [18]3 years ago
5 0

Answer:

let's look at the far left column of the periodic table. this pattern tells us that these elements are the noble gases. Noble gas is all conduct electricity and they are all odorless and colorless. The Roman numeral above this column means that there is one free electron (valence electron) in the outer shell, except for helium which has two. That's why it's a different color from the rest in the same column.

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