2. Atoms & Elements

How many elements are naturally occurring on Earth?

Which one of the following elements does NOT occur as a diatomic molecule in its elemental form?

Which of the following elements occurs naturally as diatomic molecules?

Which of the following formulas represents an element in its natural state at standard conditions?

Which of the following is an allotrope of carbon?

Which of the following is the only nonmetal that is a liquid at room temperature?

Which of the following elements does NOT exist as a diatomic molecule in its standard elemental form?

Which element in the halogen family is the only one that exists as a liquid at room temperature?

Which process is primarily responsible for the formation of heavy elements such as gold and uranium in the universe?

Which of the following elements does NOT exist as a diatomic molecule in its standard elemental form?

Copper is an example of which type of elemental form?

Which of the following elements is least likely to react with other elements under standard conditions?

Which of the following elements exists as a diatomic molecule in its standard elemental form?

Which of the following elements is ferromagnetic in its elemental form at room temperature?

Which of the following is a trace element required by all living organisms?