Give the name of the second least reactive metal in group 1

The second least reactive metal in Group 1 of the Periodic Table is Sodium (Na). Here's why:

1. Group 1 of the Periodic Table consists of the alkali metals, which include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).

2. These metals are known for their high reactivity, which increases as you move down the group. This is due to the increasing atomic radius, which makes the outermost electron more easily lost and thus increases reactivity.

3. Therefore, the reactivity of these metals in ascending order is: Lithium, Sodium, Potassium, Rubidium, Cesium, and Francium.

4. Hence, Sodium (Na) is the second least reactive metal in Group 1.

The second least reactive metal in Group 1 of the Periodic Table is Sodium (Na). Here's the step-by-step reasoning:

1. Group 1 elements are known as Alkali Metals. This group includes Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).

2. The reactivity of Alkali Metals increases as you move down the group. This is because the outermost electron is more easily lost as it's further from the nucleus, making the atom more likely to react.

3. Therefore, the least reactive metal in this group is Lithium (Li), and the second least reactive is Sodium (Na).