Question

1. a research team collects data on the properties of elements in period 4 and creates this summary: elements 19 - 21: metallic solids, form positive ions, good conductors elements 30 - 31: solid at room temperature, semiconductor properties elements 32 - 36: include solids, liquids, and gases; form negative ions or anions based on this data analysis, which conclusion about periodic trends is most supported? metallic character decreases across the period with a sharp transition from metals to non - metals metallic character decreases across the period, with metalloids showing intermediate properties all elements in the same period have similar properties regardless of their position nonmetallic character is strongest at the beginning of the period and weakest at the end

Explanation:

Elements 19 - 21 are metallic solids forming positive ions. As we move to elements 30 - 31, they are still metallic with similar properties. But elements 32 - 36 include solids, liquids, gases and form negative ions or are non - metals. This shows that metallic character decreases across the period. Metalloids in the middle have intermediate properties.

Answer:

Metallic character decreases across the period, with metalloids showing intermediate properties.