Chapter 2: Chemistry of Life

Atoms are not composed of

• protons

• neutrons

• electrons

• chemical bonds

The electrons of an atom

• are found in the nucleus along with the protons

• occupy the space surrounding the nucleus

• have a positive charge

• are attached to the positive charge of neutrons

The smallest particles of matter than can retain the chemical proeprties of carbon is a carbon

• molecule

• macromolecule

• atom

• element

All matter is composed of

• cells

• molecules

• atoms

• carbon

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Ionic bonds form between particles that have

• opposite charges

• the same charge

• no charges

• neutral charges

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Sharing of electrons in the outer energy levels of two atoms

• results in ion formation

• make both atoms stable

• only occurs if both are atoms of the same element

• is found only among carbon atoms

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A molecule that has a partial positive charge on one side and a partial negative charge on the other side is called a(n)

• nonpolar molecule

• polar molecule

• charged molecule

• ion

When placed in the same container, oil and water do not mix because

• they are both polar

• water is polar and oil is nonpolar

• they are both nonpolar

• water is nonpolar and oil is polar

Water is a polar molecule because

• it contains two hydrogen atoms for each oxygen atom

• it has a charge

• different parts of the molecule have slightly different charges

• it does not have a charge

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Which is not a unique property of water?

• frozen water floats

• water retains a large amount of heat

• water molecules stick to each other

• water cools rapidly

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