Chemists

Question 1

Democritus

Answer 1

about 400 BC: Proposed that all matter is made up of tiny, invisible particles called atomos.

Question 2

Robert Boyle

Answer 2

Regarded as the first modern chemist. Boyle defined the element as a substance that cannot be broken down into two or more simpler substances.

Question 3

Joseph Priestle

Answer 3

1794 Discovered oxygen

There are 1,794 priests who breath oxygen

Question 4

Antoine Lavosier

Answer 4

Proposed the Law of Conservation of Mass.

Question 5

Joseph Proust

Answer 5

French Chemist. 1799 Proposed Law of Definite Proportions

Proust Proportions 99 proportionate

Question 6

John Dalton

Answer 6

In 1803, proposed the Atomic Theory of Matter

it was 18:03 6:03 when John realized atomic theories matter

Question 7

Benjamin Franklin

Answer 7

American philosopher. Flew a kite attached to a key in a thunderstorm to study electricity. Concluded there are two kinds of electrical charges, which he called positive (+) and negative (-).

Question 8

Michael Faraday

Answer 8

English chemist. 1839 Suggested that the structure of atoms is related to electricity.

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Question 9

J.J. Thomson

Answer 9

Discovered electrons in 1897, Plum-pudding model

jj ate 18 plums and 97 puddings

Question 10

Robert Millikan

Answer 10

American physicist. Oil drop experiment. He determined the charge of a single electron

Question 11

Henri Becquerel

Answer 11

French physicist. 1896, discovered radioactivity

1,896 atomic bombs is called a Becquerel

Question 12

Ernest Rutherford

Answer 12

Gold Foil Experiment. He proposed that the negatively charged electrons orbited around the nucleus.

Question 13

Niels Bohr

Answer 13

1913. Bohr proposed The Planetary Model, or the Bohr’s Model.

Question 14

Henry Moseley

Answer 14

Established that the atomic number of the atom defines the identity of the element.

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Question 15

James Chadwick

Answer 15

In 1932 discovered the existence of neutrons,

Question 16

Max Planck

Answer 16

suggested that objects emit energy in small, specific amounts called quanta.

Planking takes energy in quanta

Question 17

Albert Einstein

Answer 17

but can be thought of as a stream of particles. Einstein called these particles photons.

Albert Einstein had a stream of thoughts about photons

Question 18

Louis de Broglie

Answer 18

de Broglie suggested that electrons be considered waves confined to the space around an atomic nucleus.

Brodie surfed waves

Question 19

Werner Heisenberg

Answer 19

states that it is impossible to determine simultaneously both the position and velocity of an electron or any other particle.

Question 20

Erwin Schrödinger

Answer 20

In 1926, Thus electrons do not travel around the nucleus in neat paths proposed by Bohr. Instead, they exist in certain regions called orbitals

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Question 21

Quantum theory

Answer 21

describes mathematically the wave properties of electrons