CHEMISTRY B FINAL EXAM REVIEW

The octet rule states that:

• Atoms tend to gain, lose, or share electrons to achieve eight electrons in their outer shell.

• Atoms always have eight protons in their nucleus.

• Atoms combine only with noble gases.

• Atoms do not form chemical bonds.

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A valence electron is:

• an electron in the outermost shell of an atom

• a proton in the nucleus of an atom

• a neutron in the nucleus of an atom

• an electron in the innermost shell of an atom

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3. The number of valence electrons can be determined using the periodic table by:

• Counting the number of protons in the atom

• Looking at the group number for main group elements

• Finding the atomic mass

• Checking the period number

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An ion forms when an atom gains or loses electrons. What is the charge when an atom gains an electron?

• Positive

• Negative

• Neutral

• No change

Definition for Ionic Bond.

• A chemical bond formed between two ions with opposite charges.

• A bond formed by sharing electrons equally between atoms.

• A bond formed by the delocalization of electrons among metal atoms.

• A bond formed by the attraction between nonmetal atoms.

Definition for Covalent Bond.

• A chemical bond formed by the sharing of electron pairs between atoms.

• A bond formed by the transfer of electrons from one atom to another.

• A bond formed by the attraction between metal ions and free electrons.

• A bond that only occurs between noble gases.

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Definition for Metallic Bond.

• A bond formed by the attraction between positively charged metal ions and the electrons around them.

• A bond formed by the sharing of electron pairs between atoms.

• A bond formed by the transfer of electrons from one atom to another.

• A bond formed by the attraction between nonmetal atoms.

What types of elements make up the bond? (Ionic Bond)

• A metal and a nonmetal.

• Two metals.

• Two nonmetals.

• A noble gas and a nonmetal.

What types of elements make up a covalent bond?

• Two nonmetals.

• A metal and a nonmetal.

• Two metals.

• A noble gas and a metal.

What types of elements make up the metallic bond?

• Metals.

• Nonmetals.

• Metalloids.

• Noble gases.