Chemistry, 05.11.2020 04:50 Geo777

Which of the following is a true statement? a. Periods form horizontal rows; groups form vertical columns
b. Groups form horizontal rows; periods form vertical columns
c. Categories form horizontal rows; gases form vertical columns
d. Gases form horizontal rows; categories form vertical columns

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Which of the following is a true statement? a. Periods form horizontal rows; groups form vertical c...