The symbol of an element is $Une$. Its atomic number is

Which of the following statements related to the modern periodic table is incorrect?
$(a)$ The $p$-block has $6$ columns,because a maximum of $6$ electrons can occupy all the orbitals in a $p$-shell.
$(b)$ The $d$-block has $8$ columns,because a maximum of $8$ electrons can occupy all the orbitals in a $d$-subshell.
$(c)$ Each block contains a number of columns equal to the number of electrons that can occupy that subshell.
$(d)$ The block indicates value of azimuthal quantum number $(l)$ for the last subshell that received electrons in building up the electronic configuration.

Which are the starting elements in periods $1$ to $7$?

An element whose $IUPAC$ name is $Ununtrium$ $(Uut)$ belongs to

Who developed the long form of periodic table?

According to modern periodic law,the properties of elements repeat at regular intervals when the elements are arranged in order of