Why are sodium and potassium in the same group of the periodic table
They have similar reactivity
They are both colorless
They have similar atomic weights
They are both hard and brittle
The correct answer is:
They have similar reactivity. Sodium and potassium are both in Group 1 of the periodic table, known as the alkali metals. Elements in the same group typically have similar chemical properties and reactivity due to their similar electron configurations. Sodium and potassium, therefore, exhibit similar behavior when reacting with other elements and compounds, including water.