Question

Assertion (A) : In the mordern periodic table period indicates the value of azimuthal quantum number.
Reason (R ): Each period begins with the filling of new shell.
A. If both Assertion (A) and (R ) are correct and Reason (R ) is the correct explanation of Assertion (A).
B. If both (A) and (R ) are correct but (R ) is not the correct explanation for (A).
C. If (A) is correct but (R ) is not correct.
D. If (A) and (R ) are correct

Answer 1

Correct Answer - D
Correct assertion: In the modern periodic table the period indicates the value of principal quantum number.