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Atoms & Basic Chemistry
Types of Chemical Bonds
The Properties of Water
Water Rules
Misc.
100
Atoms are composed of a. protons b. neutrons c. electrons d. all of the above
all of the above - protons, neutrons, and electrons
100
Ionic bonds form between molecules that have a. opposite charges. b. the same charge. c. no charges. d. neutral charges.
opposite charges.
100
A molecule, like water, that has a partial positive charge on one side and a partial negative charge on the other side is called a. nonpolar molecule. b. polar molecule. c. charged molecule. d. bipolar molecule.
polar molecule
100

Hydrophobic means ______________.

Not attracted to water

100

A ____________ is a radioactive substance that can be used to find tumors or blockages in the body.

tracer

200
The electrons of an atom a. are found in the nucleus along with the protons. b. occupy the space surrounding the nucleus. c. have a positive charge. d. are attached to the positive charge of neutrons.
occupy the space surrounding the nucleus.
200
The bond formed when two atoms share a pair of electrons is called a(n) a. hydrogen bond. b. ionic bond. c. covalent bond. d. water bond.
covalent bond
200
When placed in the same container, oil and water do not mix because a. they are both polar. b. water is polar and oil is nonpolar. c. they are both nonpolar. d. water is nonpolar and oil is polar.
water is polar and oil is nonpolar
200

Top four elements in living things

carbon,hydrogen, oxygen, nitrogen.

200

Acids donate ____ when dissolved in water

H+

300
The smallest particle of matter that can retain the chemical properties of carbon is a(n) a. carbon molecule. b. carbon macromolecule. c. carbon atom. d. element.
carbon atom.
300
Weak attractions between polar molecules are ______________ bonds.
hydrogen
300
Acidic solutions have a pH that is a. less than 7. b. between 7 and 14. c. a negative number. d. more than 7.
less than 7
300

What is temperature

Av. kinetic E of molecules in substance

300

The starting materials for chemical reactions are called _________________, while the new substances that are formed are called _______________.

reactants; products

400
A substance that is composed of only one type of atom is called a(n) a. nucleus. b. cell. c. element. d. molecule.
element.
400
The attraction that causes water to bond together to form drops is __________________.
cohesion
400
Due to the polarity of water, compounds that dissolve test in water contain a. nonpolar bonds. b. ionic bonds. c. polar bonds. d. both b and c.
both ionic bonds and polar bonds
400

Water stabilizes temperature by_____.

preventing movement

400

Bases donate _________when dissolved in water

OH-

500
A(n) _______________ is a group of atoms held together by covalent bonds.
molecule
500

If pH decreases from 5 to 2, the acid is ______ times stronger.

1000

500

Water heats and cools more ____________ than other liquids.

slowly

500

Lipids are _______________ molecules because they have no negative and positive poles.

nonpolar

500

Bases have a pH______________. Name a base.

Above 7, bleach