Question

the list identifies various properties of four elements: element 1 is a gas at room temperature. element 2 is a solid which conducts electricity. element 3 is a gas with an effective nuclear charge of +7. element 4 is malleable and can take the form of a shiny solid sheet. based on this list, which elements are metals? elements 1 and 4 elements 1 and 3 elements 2 and 4 elements 2 and 3

Explanation:

Metals are typically solids (at room temperature, except mercury) that conduct electricity and are malleable (can be hammered into sheets). Element 2 is a solid that conducts electricity, which is a property of metals. Element 4 is malleable and can take the form of a shiny solid sheet, which are also properties of metals. Element 1 is a gas (not a metal property) and Element 3 is a gas with an effective nuclear charge of +7 (more characteristic of non - metals like halogens).

Answer:

Elements 2 and 4