Question
Matter Interactions Unit Test
5 of 145 of 14 Items
Question
Why are sodium (Na) and potassium (K) in the same group on the periodic table?(1 point)
Responses
They are both hard and brittle.
They are both hard and brittle.
They have similar atomic weights.
They have similar atomic weights.
They have similar reactivity.
They have similar reactivity.
They are both colorless.
5 of 145 of 14 Items
Question
Why are sodium (Na) and potassium (K) in the same group on the periodic table?(1 point)
Responses
They are both hard and brittle.
They are both hard and brittle.
They have similar atomic weights.
They have similar atomic weights.
They have similar reactivity.
They have similar reactivity.
They are both colorless.
Answers
GPT-4o mini
Sodium (Na) and potassium (K) are in the same group on the periodic table because **they have similar reactivity**. Elements in the same group typically exhibit similar chemical properties due to having the same number of valence electrons. In the case of sodium and potassium, they are both alkali metals and react in a similar manner with water and other substances. Therefore, the correct response is:
**They have similar reactivity.**
**They have similar reactivity.**