Question

question 8 (5 points)
which of the following metals has a low melting point?
a) rubidium
b) sodium
c) potassium
d) calcium

Explanation:

Among the given metals, Rubidium (Rb) is an alkali metal. Alkali metals have relatively low melting points, and Rubidium has a lower melting point compared to Sodium (Na), Potassium (K), and Calcium (Ca). Sodium and Potassium also have low melting points, but Rubidium has an even lower one among these options. Calcium, being an alkaline - earth metal, has a higher melting point than the alkali metals here.

Answer:

A) Rubidium