Write the electronic configuration of each one of Li (3), Na (11) and K (19) and answer the following question:
Which one is the most reactive?
Write the electronic configuration of each one of Li (3), Na (11) and K (19) and answer the following question:
Which one is the most reactive?
Step-1: Introduction
The elements in periodic table are placed in periods and groups. Periods are horizontal rows that has increasing atomic numbers. Groups are vertical columns. There are 7 periods and 18 groups in periodic table.
Step-2: Electronic configuration
Atomic numbers of Lithium (Li), Sodium (Na) and Potassium (K) are 3, 11 and 19 respectively.
Electronic configuration of Lithium = (2, 1).
Electronic configuration of Sodium = (2, 8, 1).
Electronic configuration of Potassium = (2, 8, 8, 1).
All these elements belong to the same group 1.
Step-3: Reactivity
Tough the chemical property will be similar for the elements in the same group, the reactivity differs.
The chemical reactivity increases top to bottom in elements of group 1.
Among these elements, Lithium will be least reactive while Potassium will be more reactive.
Therefore, Potassium is more reactive.
Step-1: Introduction
The elements in periodic table are placed in periods and groups. Periods are horizontal rows that has increasing atomic numbers. Groups are vertical columns. There are 7 periods and 18 groups in periodic table.
Step-2: Electronic configuration
Atomic numbers of Lithium (Li), Sodium (Na) and Potassium (K) are 3, 11 and 19 respectively.
Electronic configuration of Lithium = (2, 1).
Electronic configuration of Sodium = (2, 8, 1).
Electronic configuration of Potassium = (2, 8, 8, 1).
All these elements belong to the same group 1.
Step-3: Reactivity
Tough the chemical property will be similar for the elements in the same group, the reactivity differs.
The chemical reactivity increases top to bottom in elements of group 1.
Among these elements, Lithium will be least reactive while Potassium will be more reactive.
Therefore, Potassium is more reactive.
