2. Atoms & Elements

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

Which of the following is the largest and heaviest element in its natural elemental form?

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

Which of the following is an example of an elemental molecule?

Which of the following best describes synthetic elements?

Where is the lanthanide series located on the periodic table?

How many elements have been found to occur naturally on Earth?

Which of the following elements does NOT occur naturally as a diatomic molecule?

Which element is the most abundant in Earth's crust by weight?

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

Which of the following molecular models represents an element?

Which one of the following elements does not exist as a diatomic molecule in nature?

In what form does nitrogen primarily exist in Earth's atmosphere?

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

Which of the following best describes the properties of noble gases?