Which of the following elements has the highest ionization energy in the alkali
Practice Questions
Q1
Which of the following elements has the highest ionization energy in the alkali metal group? (2023)
Lithium
Sodium
Potassium
Rubidium
Questions & Step-by-Step Solutions
Which of the following elements has the highest ionization energy in the alkali metal group? (2023)
Step 1: Understand what ionization energy is. It is the energy required to remove an electron from an atom.
Step 2: Know that alkali metals are in Group 1 of the periodic table. The alkali metals include Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
Step 3: Remember that ionization energy generally decreases as you move down a group in the periodic table. This is because the atomic size increases, making it easier to remove an electron.
Step 4: Compare the atomic sizes of the alkali metals. Lithium is the smallest, followed by Sodium, Potassium, and so on.
Step 5: Since Lithium has the smallest atomic size among the alkali metals, it has the highest ionization energy.
