Properties

Question 1

Physical properties

Answer 1

Physical change affects the state of matter but not the chemical identity.

Question 2

Chemical properties

Answer 2

Chemical change makes the original substance no longer exist

Question 3

Extensive properties

Answer 3

Depend on the amount of matter
Mass, volume and heat

Question 4

Intensive properties

Answer 4

Do not depend of the amount of matter.
density and temperature

Question 5

Democritus

Answer 5

Theory of “atonism”.
Small individual bodies interacting with other atoms moving mechanically

Question 6

John Dalton

Answer 6

Math teacher turned chemist. Elements, compunds, and chemical reaction.

Question 7

Law of definate proportions

Answer 7

All samples of a pure compound contain the sand elements in the same proportion by mass

Question 8

Law of multiple proportions

Answer 8

When 2 elements react to form more than 1 compound, a fixed mass of one element will react with masses of the other element on a ratio of small, whole numbers

Question 9

Jj Thompson

Answer 9

Discovered the charge to mass ration of the electron using cathode ray

Question 10

Robert Millikan

Answer 10

Discovered the charge of the electron using oil droets, discovered the mass of an electron.

Question 11

Earnest Rutherford

Answer 11

Gold foil experiment
Proton and nucleus

Question 12

James Chadwick

Answer 12

Discovered the neutron