Science

Question 1

The smallest unit of matter that is composed of three sub-atomic particles

Answer 1

Atom

Question 2

• Proton-

Answer 2

Eugene Goldstein

Question 3

• Electron-

Answer 3

Joseph John Thomson

Question 4

• Neutron-

Answer 4

James Chadwick

Question 5

States that water is the simplest substance on Earth.

Answer 5

THALES OF MILETUS

Question 6

Air is the primary element on earth

Answer 6

. ANAXIMENES

Question 7

Fire is the simplest substance on Earth

Answer 7

HERACLITUS

Question 8

Separated indivisible matter into four elements; earth, water, fire and air

Answer 8

EMPEDOCLES

Question 9

First proposed the idea that all matter was made up of tiny indivisible particles

Answer 9

LEUCIPPUS AND DEMOCRITUS

Question 10

Rejected Democritus’ theory instead, he accepted the Four Elements Theory

Answer 10

ARISTOTLE

Question 11

Developed a theory that matter is made of atoms, which are small indivisible particles and compared it to a BILLIARD BALL

Answer 11

. JOHN DALTON

Question 12

Discovers the electron, using properties of cathode rays and proposed the PLUM PUDDING MODEL of the atom (big positively charged sphere studded with negatively charged electrons

Answer 12

JOSEPH JOHN THOMSON

Question 13

Discovers the Nucleus, came up with the NUCLEAR MODEL of the atom (electrons orbiting around the nucleus with proton

Answer 13

ERNEST RUTHERFORD

Question 14

Proposed the ATOMIC PLANETARY MODEL (electrons revolve around the nucleus just as the planets orbit the sun)

Answer 14

NEILS BOHR

Question 15

Expanded the idea that electrons behaved as particles and waves, this developed the QUANTUM MECHANICAL MODEL of the atom

Answer 15

. ERWIN SCHROEDINGER

Question 16

Atomos

Answer 16

Indivisible