Question

The group number of potassium is 1.
If true enter 1, else enter 0.

Answer 1

The atomic number of potassium is 19 and its chemical symbol is K. The electronic configuration of potassium is $[Ar]4{s^1}$. Groups are the vertical columns in the periodic table.

Complete step by step solution:
We will first know about the groups in the periodic table of elements and then we will find where potassium is placed.
- All the elements are placed in the modern periodic table according to their electronic configuration. We can divide the periodic table into groups and periods.
- Groups are the set of elements placed in the same vertical columns in the periodic table. Periods are the set of elements placed in the same horizontal rows in the periodic table.
- There are a total of 18 groups in the periodic table. Total number of periods present in the periodic table is 7.
- All the elements present in the same group generally have the same number of electrons in their valence orbitals.
- Potassium has an atomic number of 19. Its chemical symbol is K. We know that its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^1}$.
- Now, we can say that its valence shell configuration is $n{s^1}$. Here, n is equal to 4. So, $n{s^1}$ is the valence shell electronic configuration of group 1 elements.
- All the group-1 elements have one electron in their valence orbital which is s-orbital.
So, it is true that the group number of potassium is 1.

So, we will enter 1.

Note: Remember that in the periodic table, group-1 is situated at the left side. That means the numbers to the groups are given starting from the left side. The other group-1 element other than K is Li, Na, Rb and Cs.