Chapter 1

Question 1

Observation/Questions (scientific method)

Answer 1

Deals with facts. (Why is the sky blue?)

Literature review for chemists.

Question 2

Hypthesis (scientific method)

Answer 2

Interpretation of observations…must be testable. With Goals

Question 3

Experiment (Scientific method)

Answer 3

Test validity of the hypothesis

Question 4

Theory (scientific method)

Answer 4

If the hypothesis and experiment can be replicated byt others, it can be amended.Published in a Peer Reviewed Journal

Question 5

Law of Conservation of Mass

Answer 5

a relation stating that in a chemical reaction, the mass of the products equals the mass of the reactants

Question 6

Matter

Answer 6

this has a physical state and chemical constitution.

Has Mass and takes up space

Question 7

Chemistry (what is it?)

Answer 7

The study of matter and the changes it undergoes

Question 8

Atom

Answer 8

discrete particle

Question 9

Molecule

Answer 9

2 or more atoms bonded together

Question 10

IntERmolecular bonds

Answer 10

Bonds between 2 or more molecules. “Physical” Bonds due to electrstatic attraction. (Opposites attract) (Water attracted to water)

Question 11

IntRAmolecular Bonds

Answer 11

Bonds within a molecule “Chemical” Bonds. H2O

Question 12

Solid

Answer 12

definite shape and volume. Particles are tightly packed. Lots of intermolecular bonds. No positional movement. (Iron)

Question 13

Liquid

Answer 13

Particles are more loosely packed. Fewer intermolecular bonds. Tumbling movement.

Question 14

Gas

Answer 14

Particles that are very far apart. No intermolecular force or bond. Constant movement. Kinetic energy is too great.

Question 15

Physical Changes

Answer 15

break INTERmolecular bonds all day.

Question 16

Chemical Changes

Answer 16

atoms are changed into new substances through a reaction. i.e. Na(s) and Cl(g) join INTRAmolecularly and create NaCl–Sodium Chloride–>table salt.