1.

Which of the following statements about the Modern Periodic Table is correct : (a) It has 18 horizontal rows known as Periods(b) It has 7 vertical columns known as Periods(c) It has 18 vertical columnsknown as Groups(d) It has 7 horizontal rows known as Groups​

Answer»

(c) It has 18 VERTICAL COLUMNS KNOWN as GroupsExplanation:PLEASE thank my 20 ANSWERS



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