Which of the following is NOT a property of group 1 metals?React with water to form hydrogenVery reactiveSoft and shinyLow melting point

Analysis of Group 1 Metals Properties

Group 1 metals, also known as alkali metals, have unique properties due to their electronic structure. Let's analyze each option provided:

1. React with water to form hydrogen: This is a characteristic property of alkali metals. When they react with water, they produce hydrogen gas and a corresponding hydroxide (e.g., sodium reacts with water to form sodium hydroxide and hydrogen gas).

2. Very reactive: Alkali metals are indeed very reactive, especially with nonmetals. Their reactivity increases down the group, from lithium to cesium.

3. Soft and shiny: Group 1 metals are generally soft and can be cut with a knife. They also possess a shiny luster when freshly cut, although they tarnish quickly due to oxidation.

4. Low melting point: It is true that alkali metals have lower melting points compared to most other metals; however, the melting points vary and are not uniformly low, especially when compared to other groups of metals.

After analyzing these properties, all listed attributes are generally true for alkali metals except the possible interpretation of "low melting point," as it can vary significantly compared to other elements. However, if the context implies "not low compared to other metals generally," this could be seen as less characteristic.

Final Answer

The option "Low melting point" could be argued as NOT a clear property of all group 1 metals when compared to other types of metals, as their melting points vary significantly across the group in relation to other metals.