Question

7 multiple choice 1 point if you wanted to make a crucible for melting sodium (na), which most suitable for that purpose? potassium (k) calcium (ca) rubidium (rb) lithium (li)

Explanation:

Step1: Consider melting - point and reactivity

A crucible material should have a higher melting - point than sodium and not react with it. Among the given elements, calcium has a relatively high melting - point and is less reactive with sodium compared to the other alkali metals. Potassium, rubidium, and lithium are all alkali metals like sodium and are likely to react with it or have lower melting - points.

Answer:

B. Calcium (Ca)