In the periodic table, the element with atomic number 16 will be placed in the group
The electron configuration of this element will be 1s22s22p63s23p4 there are 6e− in outer most shell, Therefore its group is VIthA.
In the modern periodic table, if an element with atomic number 'X' is an inert gas then an element with atomic number (X-1) will be placed in:
An element X belongs to group IIA and the fourth period in the periodic table. Find out the atomic number of X and the element which is placed just below X in the periodic table.