Understanding Atoms and Elements

What distinguishes an atom from an element?

• Atoms are made of elements.

• Elements are the smallest unit of matter.

• Elements have a fixed number of electrons.

• Atoms are identified by the number of protons in their nucleus.

Which of the following is a characteristic of metals?

• They are mostly gases at room temperature.

• They are located on the right side of the periodic table.

• They are poor conductors of electricity.

• They are shiny and good conductors of heat.

Where are non-metals generally located on the periodic table?

• On the right side

• In the center

• At the bottom

• On the left side

What is a characteristic of molecular elements?

• They are always gases.

• They have molecules as their base unit.

• They are always metals.

• They consist of single atoms.

Which of the following elements is an example of a diatomic molecule?

• Mercury

• Oxygen

• Helium

• Sodium