ELEMENTS

What is an element?

• A substance that can be broken down into simpler substances by chemical processes.

• A pure substance that cannot be broken down into two or more simpler substances by chemical processes.

• Any substance found naturally on Earth.

• A substance that always exists as a gas at room temperature.

Which of the following correctly represents the chemical symbol for Oxygen?

• Ox

• O

• Oy

• O2

Which of the following correctly represents the chemical symbol for Iron?

• Fe
• I
• Fe2
• Ir

Which of the following is NOT a characteristic property of most metals?

• They are good electrical conductors.

• They have a dull appearance.

• They are malleable and ductile.

• They have high melting points.

Which statement accurately describes non-metals?

• They are typically shiny and good conductors of heat.

• They are always found in a gaseous state at room temperature.

• They have low melting and boiling points and are poor electrical conductors (with some exceptions).

• They are malleable and sonorous.