Chapter 11: Elements and Chemical Bonds

What is an atom?

• A single element

• Two or more of the same element

• Two or more elements chemically bonded

• A mixture of different elements

What defines a molecule?

• A single element

• Two or more of the same element

• Two or more elements chemically bonded

• A mixture of different elements

What is a compound?

• A single element

• Two or more of the same element

• Two or more elements chemically bonded

• A mixture of different elements

Which of the following is true about compounds?

• They consist of a single element

• They are two or more of the same element

• They are chemically bonded in a fixed ratio

• They are a mixture of different elements

What is a valence electron?

• The innermost electron of an atom

• The outermost electron of an atom

• An electron that does not participate in bonding

• A proton in the nucleus

How many electrons can the first ring hold?

• 2 electrons

• 4 electrons

• 6 electrons

• 8 electrons

How many electrons can the second ring hold?

• 2 electrons

• 4 electrons

• 8 electrons

• 10 electrons

How many electrons can the third ring hold?

• 2 electrons

• 6 electrons

• 8 electrons

• 12 electrons

What role do valence electrons play in an atom?

• They determine the atom's mass

• They participate in chemical bonding

• They are responsible for the atom's color

• They are found in the nucleus

What forms when two atoms share one or more pairs of valence electrons?

• Ionic bond

• Metallic bond

• Covalent bond

• Hydrogen bond