Periodic Table

What is the atomic number of copper?

• 29

• 63

• 79

• 47

What is the atomic number of gold?

• 79

• 63

• 29

• 47

How do valence electrons determine an atom’s chemical properties, including reactivity?

• They determine the atom's mass.

• They determine the atom's reactivity.

• They determine the atom's color.

• They determine the atom's size.

How are elements classified on the periodic table?

• By their color.

• By their size.

• By their atomic number.

• By their shape.

What is the basic unit of a chemical element?

• Molecule

• Atom

• Compound

• Mixture

How many basic parts does an atom consist of?

• 2

• 3

• 4

• 5

Which of the following are the basic parts of an atom?

• Protons, neutrons, electrons

• Protons, neutrons, molecules

• Electrons, molecules, compounds

• Neutrons, compounds, mixtures

What is the atomic mass of an atom?

• The sum of electrons and protons

• The sum of protons and neutrons

• The sum of neutrons and electrons

• The sum of protons, neutrons, and electrons

What charge do electrons have?

• Positive

• Neutral

• Negative

• No charge

Where are electrons located in an atom?

• Inside the nucleus

• Outside the nucleus in the electron cloud

• In the center of the nucleus

• In the proton cloud