Question

Assertion (A): Modern periodic table is known as the long form of the periodic table.
Reason (R) : Modern periodic table consists of seven groups and eighteen periods.
a) Both A and R are correct and R is the correct explanation of A.
b) Both A and R are correct but R is not the correct explanation of A,
c) A is correct, R is incorrect.
d) A is incorrect but Ris correct​

Answer 1

Answer:

'Option c' is the correct answer

• Modern periodic table consists of 18 groups and 7 periods.