In the modern periodic table,the period indicates the value of:

Which among the following electronic configurations belong to main group elements?
$A. [Ne] 3s^1$
$B. [Ar] 3d^3 4s^2$
$C. [Kr] 4d^{10} 5s^2 5p^5$
$D. [Ar] 3d^{10} 4s^1$
$E. [Rn] 5f^0 6d^2 7s^2$
Choose the correct answer from the options given below:

In which group of the periodic table will the element with $Z=120$ be placed?

Consider the following electronic configuration of an element $(P)$ : $[Xe] 4f^{14} 5d^1 6s^2$. Then,the correct statement about element $P$ is:

Which of the following pairs has both members from the same period of the periodic table?

Which of the following statements is wrong?