A liquid can exist only

Geometrical isomerism can exist only when the molecule:

The roots of a pure quadratic equation exists only if "_______" .

Which of the following can exist in solid liquid and gaseous forms ? A) Metalloids B) Inert elements C) Non-metals D) Metals

State true or false. If false, give the correct statement. Atoms cannot exist alone. They can only exist as groups called molecules.