Question

Which of the following statements about the Modem 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 columns known as Groups
(d) It has 7 horizontal rows known as Groups​

Answer 1

Answer:

c is correct answer...

Answer 2

Answer:

The Modern Periodic table has 18 vertical columns known as groups and 7 horizontal rows known as periods.