Elementary Knowledge: Understanding Elements

A substance that cannot be broken down into simpler substances by ordinary chemical means (correct)

A substance that is always a liquid at room temperature

A substance that only exists in compounds

A substance that can be broken down into simpler substances by ordinary chemical means

By exposing them to sunlight

By using extreme heat

By mixing with other elements

They cannot be broken down into simpler substances by ordinary chemical means (correct)

Its inability to be broken down into simpler substances by ordinary chemical means (correct)

Its color and appearance

Its ability to react with other elements

Its availability in nature