Answer:
The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups. Groups are labeled at the top of each column
the space billioners whale and shark bite the spaceship and then happily ever after
POINTS LANG
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Answer:
The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups. Groups are labeled at the top of each column
the space billioners whale and shark bite the spaceship and then happily ever after
POINTS LANG