Chapter 1

Question 1

matter

Answer 1

anything that occupies space and can be perceived by senses

Question 2

physical properties of materials

Answer 2

characteristics that can be observed without changing the chemical identity of the material EX. state, color, melting point, density

Question 3

physical change

Answer 3

change in form but not composition EX crack an egg its still an egg

Question 4

chemical properties of materials

Answer 4

associated with a change in composition (not going to be the same identity)
Reaction or combustion with other types of matter, one or some types of matter are transformed
EX toxicity, oxidation, heat combustion, chemical stability, flammability, coordination number, reactivity

Question 5

law of conservation of mass

Answer 5

-Total mass remains constant in a chemical change (reaction
- mass in = mass out

Question 6

pure substance

Answer 6

cannot be separated into any other types of matter by any type of physical process

can be element - cannot be broken down or converted EX Co

Can be compound - substance composed of 2 or more elements EX H2O

Question 7

Law of constant composition

Answer 7

Pure compound, contains constant proportions (contains same amount for each compound, water is always H2O)

Question 8

Mixture

Answer 8

consist of 2 or more pure substances that don’t lose individual identities (no chemical reaction in mixture)

can be heterogenous - components remain separate ex. cement, blood, frappe

Homogenous - complete intermingling of components ex . coffee, laundry detergent, bronze (stuff on top is same on bottom)