How to Find Group Number of f Block Element?

Finding the group number of an f block element can be a bit tricky, but it can be done by following a few key rules and steps. Here's a guide on how to determine the group number of an f block element:

Identify the Element
- First, you need to identify the f block element you are working with. These elements are located in the f block of the periodic table, between groups 3 and 12.

Determine the Period Number
- The period number of an element corresponds to the energy level of its outermost electrons. For f block elements, the period number can be determined by looking at the row in which the element is located on the periodic table.

Count the Number of Electrons in the f Subshell
- The group number of an f block element is equal to the number of electrons in its f subshell. To find this number, you need to look at the position of the element within the f block and determine the number of electrons in the f subshell.

Calculate the Group Number
- Once you have determined the number of electrons in the f subshell, you can use this number to calculate the group number of the f block element. The group number is equal to the number of electrons in the f subshell minus the number of electrons in the preceding s and d subshells.

By following these steps and rules, you can successfully find the group number of an f block element on the periodic table. Remember to pay close attention to the electron configuration of the element and its position within the f block to accurately determine its group number.

F block elements belong to group 3