AP Chapter 2 (The Chemical Context of Life)

Why are chemistry and biology inherently related subjects?

• Both are about matter ("stuff"). Bio is more specific to living things

• Chem is based on atoms/molecules and their interactions. Living things function due to atoms/molecules

• The functioning of living things is due to chemistry/chemical reactions/molecular interactions (i.e. metabolism)

• All answers are correct

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Which of the following is the smallest unit of a living thing?

• Cell

• Atom

• Molecule

• Organ

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What are the elements of life?

• CHNOPS

• C, H, and O

• C and H₂O

• Fire, magic, thunder, and Kanye

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What are the outer most electrons called?

• inner

• ionic

• cloud

• valence

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Which of the following statements about the nucleus of an atom is false?

• It contains protons and neutrons

• It is very small/dense

• Its overall charge is +

• It allows for the chemical behavior of the atom

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Which of the following statements regarding a Carbon-14 atom is false?

• Its atomic number is 6

• It contains 6 protons

• It contains 14 neutrons

• It is an isotope

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_ are the subatomic particles that determine how atoms interact with one another (and as a side note this is what we care about in biology).

• Electrons

• Neutrons

• Protons

• ions

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Covalent bonds involve a _ of electrons. In a triple covalent bond (represented by three lines) there are _ total electrons involved in the bond

• Sharing, 6

• Sharing, 3

• Transfer, 6

• Transfer, 3

Which of the following statements regarding polar covalent bonds and molecules is false?

• A polar molecule must contain at least one covalent bond with an uneven sharing of electrons

• If a molecule contains polar covalent bonding then it evenly shares electrons

• Polar molecules never involve ionic bonding (only covalent) with other molecules

In an ionic bond the metal atom loses one or more electrons to become _ in charge. This type of ion is called a(n) _

• Positive, cation

• Positive, anion

• Negative, cation

• Negative, anion

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