AP Bio Chemistry of life Review

The smallest unit of matter is

• Cell

• Atom

• Electron

• Proton

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The atomic number is equal to

• The number of protons

• The number of neutrons

• The number of electrons

• The number of protons plus neutrons

Forms of an element with different numbers of neutrons

• Atom

• Molecule

• Isotope

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The bond between NaCl is an example of what kind of Bond

• Ionic

• Covalent

• Both

• Neither

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What kind of Bond involves sharing electrons and example would be methane CH4

• Ionic

• Covalent

• Both

• Neither

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What is the strongest of all the bonding types?

• Covalent
• Ionic
• Hydrogen
• Metallic

What makes a molecule polar?

• Equal sharing of valence electrons
• Unequal sharing of valence electrons
• Stealing of electrons
• Temporary charges that come and go

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Because water has a positively charged end and a negatively charged end, it can be described as

• amphipathic
• hydrophobic
• polar
• nonpolar

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Water molecules require a lot of energy to break the hydrogen bonds.  This gives water a high

• density
• polarity
• solvency
• specific heat

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What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"

• Purity
• Polarity and cohesion
• High heat capacity
• Expansion upon freezing

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