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KatRina [158]
3 years ago
14

WILL GIVE BRAINLIEST

Chemistry
1 answer:
forsale [732]3 years ago
6 0

Answer:

atomic number

H is on the very top left

they are organized into columns with somewhat similar behaviors ie the alkali metals (the first column or period) are all very reactive (except H as it only has one electron in one shell, it is sometimes put into its own separate category

Explanation:

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