Question
Why are sodium (Na) and potassium (K) in the same group on the periodic table? (1 point)
• They are both hard and brittle.
• They are both colorless.
• They have similar atomic weights.
• They have similar reactivity.
• They are both hard and brittle.
• They are both colorless.
• They have similar atomic weights.
• They have similar reactivity.
Answers
GPT-5 mini
They have similar reactivity — both are alkali metals with one valence electron, giving them similar chemical properties.