To which chemical family is the unknown element Xx likely to belong, if the element had the following properties? It reacts with oxygen to form XxO. It possesses a silver metallic luster. It has a low melting point.

Answer 1

Based on the properties you've provided for the unknown element Xx, it is likely to belong to the alkali metals family. Here’s the reasoning:

1. Reaction with Oxygen: The fact that element Xx reacts with oxygen to form XxO suggests that it likely forms a simple oxide, which is common for metals, particularly the alkali metals.

2. Silver Metallic Luster: Alkali metals are known for their shiny, metallic appearance when freshly cut.

3. Low Melting Point: Alkali metals have relatively low melting points compared to most other metals (e.g., lithium, sodium, potassium), which aligns with your description of Xx.

Therefore, given these characteristics, it is reasonable to conclude that the unknown element Xx is likely an alkali metal.