Chapter Three (Sections 1-3)

Question 1

Element

Answer 1

A substance that cannot be seperated or broken down into simpler substances by chemical means.

Question 2

Pure Substance

Answer 2

A sample of matter, either a single element or a single compound, that has definite chemical and physical properties.

Question 3

Metal

Answer 3

An element that is shiny and that conducts heat and electricity well.

Question 4

Nonmetal

Answer 4

An element that conducts heat and electricity poorly.

Question 5

Metalloid

Answer 5

An element that has properties of both metals and nonmetals.

Question 6

Compound

Answer 6

A substance made up of atoms of two or more different elements joined by chemical bonds.

Question 7

Mixture

Answer 7

A combination of two or more subtances that are not chemically combined.

Question 8

Solution

Answer 8

A homogeneous mixture of two or more substances uniformly dispersed throughout a single phase.

Question 9

Solute

Answer 9

In a solution, the substance that dissolves in the solvent.

Question 10

Solvent

Answer 10

In a solution, the substance in which the solute dissolves.

Question 11

Concentration

Answer 11

The amount of a particular substance in a given quantity of a mixture, solution, or ore.

Question 12

Solubility

Answer 12

The ability of one substance to dissolve in another at a given temperature and pressure.

Question 13

Suspension

Answer 13

A mixture in which particles of a material are more or less evenly dispersed throughout a liquid or gas.

Question 14

Colloid

Answer 14

A mixture consisting of tiny particles that are intermediate in size between those in solutions and those in suspensions and that are suspended in a liquid, solid, or gas.

Question 15

Democritus

Answer 15

Thought that you would eventually end up with a particle that can’t be cut.

Question 16

Dalton

Answer 16

Believed that everything is made of atoms, atoms of the same element are exactly alike while atoms of different atoms are different, and that atoms join with other atoms to make new substances.

Question 17

Thomson

Answer 17

Discovered that there are smaller particles inside the atom. Did the plum pudding model.

Question 18

Bohr

Answer 18

Studied the way atoms react to light. He proposed that atoms move around in certain paths.

Question 19

Rutherford

Answer 19

Designed an experiment to study the parts of the atom. He did the gold foil experiment.