Question

1pt which of the following are properties of alkali metals?

a. mostly solids, dull, brittle, reactive, conductors

b. mostly solids, luster, high density, conductors

c. mostly gases, brittle, dull, low density, insulators

d. solids, luster, malleable, conductors, reactive

Explanation:

Alkali metals (Group 1 in the periodic table) are solids at room temperature. They have a metallic luster. They are malleable (can be hammered into thin sheets). They are good conductors of heat and electricity. They are highly reactive, especially with water.

• Option A: Alkali metals are not dull (they have luster) and not brittle (they are malleable).
• Option B: Alkali metals have low density (not high density).
• Option C: Alkali metals are not gases (they are solids), not dull (have luster), and are conductors (not insulators).
• Option D: Matches the properties of alkali metals (solids, luster, malleable, conductors, reactive).

Answer:

D. solids, luster, malleable, conductors, reactive