For each property listed, identify the type of element it describes. very good electrical conductivity: amphoteric, able to form acidic or basic compounds: gaseous at room temperature: solid at room temperature: brittle:

We have that the elements descriing each situation are

From the Question we are given

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Very good electrical conductivity: metals only

Amphoteric, able to form acidic OR basic compounds: metalloids only

Gaseous at room temperature: nonmetals only

Solid at room temperature: metal and metalloids

Brittle: metalloids and nonmetals

Explanation:

Ed2021, Physical Science