Unit 6 Section 3 Atoms and Molecules Review

What is an element?

• A substance made from two or more simpler substances.
• The basic unit of matter
• A substance that is a good conductor of heat and electricity
• A substance that cannot be broken down into simpler materials by ordinary means

What do protons and electrons have that neutrons do not?

• mass
• charge
• weight
• volume

What elements are the most abundant in Earth's atmosphere?

• water and air
• nitrogen and oxygen
• silicon and aluminum
• carbon dioxide and oxygen

Metals all share certain physical properties. Which property do most metals share?

• brittle (break easily)
• malleable
• poor conductor of heat and electricity
• low boiling point

Look at the diagram below. It shows a section of the Periodic Table. How is the element carbon different from the element nitrogen?

• Carbon has a negative charge
• Nitrogen has a negative charge
• They have different numbers of protons
• Carbon can be broken down into simpler substances

____________ are the basic building blocks of matter.

• Protons
• Electrons
• Neutrons
• Atoms
• Adams

Name the three (3) subatomic particles.

• Protons, Electrons, Atoms
• Protons, Electrons, Neutrons
• Protons, Electrons, Matter
• Protons, Electrons, Nucleus

A(n) _____________ is made up of only one type of atom and is a pure substance.

• element
• atom
• subatomic particle
• compound

What is the one thing that differs from one element to another?

• Number of neutrons in the nucleus
• Number of protons in the nucleus
• Number of electrons in the electron cloud

How many known elements are there?

• 50
• 75
• 110
• 210