1.

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

Answer»

c and d option is true...Explanation:HOPE it will help you... KEEP SUPPORTING guys pls Mark me in BRAINLIST



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