Atomic Theory

Question 1

He suggest that everything came from the four (4) classical elements – Fire, Air, Water, and Earth (that which became the basis of every action fantasy genre in fiction)

Answer 1

EMPEDOCLES

Question 2

He asserted that each element is associated with two distinct properties. Example, metal; iron is classified as earth and air.​

Answer 2

EMPEDOCLES

Question 3

supported Empedocles’ idea about the four elements and added a fifth one: Aether

Answer 3

Aristotle

Question 4

This principle is also used by alchemists in their studies​

Answer 4

Alchemy

Question 5

a Greek philosophers who didn’t agree with the “Five Elements” theory. ​

Answer 5

Democritus

Question 6

He believed that everything is made of very small particles, which can be achieved through numerous divisions of material until the tiniest material couldn’t be divided any further​ particle, dubbed atomos

Answer 6

Democritus

Question 7

The Movement that was Left Ignored​

Answer 7

Atomism

Question 7

He said that dubbed atomos (Gk. “undivided”), was stated to be the origin of all things​

Answer 7

Democritus

Question 8

used to transmute base metals such as iron and tin into “pure” metals such as gold and platinum.

Answer 8

Alchemy

Question 8

intertwined their chemical endeavors with spiritual and mystical concepts, including the study of the five (fire, air, water, earth, and aether)​

Answer 8

Alchemists

Question 8

published his research in 1661, entitled The Sceptical Chymist (The Skeptical Chemist). ​

Answer 8

Robert Brown

Question 9

used these to discover universal cures for all diseases and achieve longevity (or immortality)

Answer 9

Alchemy

Question 9

Robert Brown published his research in 1661, entitled The

Answer 9

Sceptical Chymist (The Skeptical Chemist). ​

Question 10

It is a theory where Elements are made up of small indivisible particles called ATOMS.​

Answer 10

John Dalton; Law of Multiple Proportions

Question 10

It encouraged scientists to conduct experiments and use the results to further develop chemistry. ​

Answer 10

Sceptical Chymist (The Skeptical Chemist). ​

Question 11

He came up with a theory that marked the beginning of the modern era of chemistry. ​

Answer 11

John Dalton

Question 12

In this theory any given pure element, all properties of a particular element are uniform throughout its atoms. Atoms of different elements differ in their properties; ​

Answer 12

John Dalton; Law of Multiple Proportions

Question 13

In this theory Atoms are conserved in chemical reactions – they are only rearranged, separated, or combined with other atoms​

Answer 13

John Dalton; Law of Multiple Proportions

Question 13

He is the man behind the findings of the composition of matter (1779)

Answer 13

Joseph Proust’s

Question 14

John Dalton came up with a theory that marked the beginning of the modern era of chemistry, called?

Answer 14

John Dalton; Law of Multiple Proportions

Question 15

In this theory Compounds are composed of atoms of different elements. The component atoms in a given compound exist only in whole-number ratios (i.e., no fraction or decimal values);

Answer 15

John Dalton; Law of Multiple Proportions

Question 16

He proposed an important principle that quantitatively analyzed chemical reactions.

Answer 16

Joseph Proust’s

Question 17

He suggested that the formation of compounds involves the combination of elements in similar proportions by mass regardless of the sample size.​

Answer 17

Joseph Proust’s; Law of Definite Proportions

Question 18

He asserted that all things are composed of 4 primal elements

Answer 18

Empedocles

Question 19

He formed the Atomism Movement

Answer 19

Democritus

Question 20

He proposed of Law of Definite Proportions

Answer 20

Joseph Proust

Question 21

He formulated the Atomic Theory and proposed the Law of Multiple Proportions

Answer 21

John Dalton

Question 22

The one who created the Periodic Table

Answer 22

Dmitri Mendeleev

Question 23

He rearranged all known chemical elements in his time in a table based on its atomic masses

Answer 23

Dmitri Mendeleev

Question 24

They observed that radioactivity causes some atoms to break down spontaneously

Answer 24

Antoine Becquerel and Marie Currie

Question 24

he discovered X-ray

Answer 24

Wilhelm Rontgen

Question 25

He discovered electrons

Answer 25

Joseph John Thompson

Question 26

He proposed the “Plum-Pudding Atom Model”

Answer 26

Joseph John Thomson

Question 27

An atom model where it says that the electrons are dispersed from atoms itself

Answer 27

Plum-Pudding Atom Model

Question 27

An electron has a charge of??

Answer 27

-16022 x 10 -19 C (coulombs)

Question 28

He found that An electron has a charge of -16022 x 10 -19 C (coulombs)

Answer 28

Robert MIlikan

Question 29

He noted that the atoms are most space.

Answer 29

Ernest Rutherford

Question 29

He discovered protons

Answer 29

Ernest Rutherford

Question 29

He discovered neutrons

Answer 29

James Chadwick

Question 30

He proposed the orbital or planetary atom model

Answer 30

Neils Bohr

Question 31

solid sphere/billiard ball model of atom

Answer 31

Dalton’s atomic model

Question 31

performed the Alpha Scattering gold foil experiment

Answer 31

Ernest Rutherford