Atomic Theory Scientist (Question First)

Question 1

Engaged in thought experiments → Start of the Atomic Theory

Answer 1

Democritus

Question 2

Proposed idea that all matter is composed of atoms (tiny particles).

Answer 2

Democritus

Question 3

“The Father of Modern Atomic Theory”

Answer 3

John Dalton

Question 4

Inferred proportions of elements

Answer 4

John Dalton

Question 5

Proposed that Oxygen and Hydrogen are components of water

Answer 5

John Dalton

Question 6

First to discover electrons but had no explanation for it

Answer 6

William Crookes

Question 7

Discovered the Electron and explained it (found charge and mass)

Answer 7

J.J Thomson

Question 8

Showed that electrons were part of matter - the structure of the atom had mass

Answer 8

J.J Thomson

Question 9

“Raisins in Pudding”

Answer 9

J.J Thomson

Question 10

“The Father of the Nuclear Atomic Atom”

Answer 10

Ernest Rutherford

Question 11

Made improvements to the atomic model in regard to the characteristics of the nucleus and where the mass is found

Answer 11

Ernest Rutherford

Question 12

Discovered radiations could split into 3 types of beams with magnetic fields

Answer 12

Ernest Rutherford

Question 13

“The Gold Foil Experiment”

Answer 13

Ernest Rutherford

Question 14

Identified the Proton

Answer 14

Ernest Rutherford

Question 15

Discovered Radioactivity

Answer 15

Henri Becquerel

Question 16

Discovered Protons, but did not know what it is

Answer 16

Goldstein

Question 17

Discovered the Neutron

Answer 17

Chadwick

Question 18

Proposed that light was a particle

Answer 18

Newton

Question 19

Proposed that light was a wave

Answer 19

Huygen

Question 20

Proposed that light is an electromagnetic wave

Answer 20

James Maxwell

Question 21

Pioneered the field of the study of black bodies

Answer 21

Kerchhoff

Question 22

Studied “Black Bodies”

Answer 22

Max Plank

Question 23

Found a formula that treated light as if it was discrete, NOT continuous
(Treated the energy of the light in quantums of energy)

Answer 23

Max Plank

Question 24

Discovered the Photoelectric Effect

Answer 24

Heinrich Hertz

Question 25

Says light consisted of streams of Planck’s Quanta, and called them Photons

Answer 25

Albert Einstein

Question 26

Used Spectroscopy to understand spectral lines

Answer 26

Neils Bohr

Question 27

improvements to the characteristics of the electron

Answer 27

Neils Bohr

Question 28

Discovered bright line spectra (coloured lines) and absorption spectra (gases that absorb coloured lines) using gas discharge tube

Answer 28

Neils Bohr

Question 29

Suggested that light in discrete quantums are also only allowed certain energy levels

Answer 29

Neils Bohr

Question 30

only accurately predicts special line for only hydrogen

Answer 30

Neils Bohr

Question 31

Developed Spectroscopy in 1859

Answer 31

Robert Bunsen & Gustav Kirchhofft

Question 32

Discovered the Uncertainty Principle

Answer 32

Werner Heisenberg

Question 33

Used (devised) the Wave Equation (Wave Mechanics) to determine the probability of finding an atom’s electrons at a particular point within an atom

Answer 33

Erwin Schrodinger

Question 34

First Proposed that matter (particles) could have wave-like properties

Answer 34

Lous De Broglie

Question 35

“Father of Modern Chemistry”

Answer 35

Antoine Lavoiser

Question 36

Eye drop experiment

Answer 36

Milikan

Question 37

Principle - Electrons enter orbitals of lowest energy first

Answer 37

Aufbau

Question 38

Principle - No two electrons in the same atom can have the same set of quantum numbers

Answer 38

Pauli

Question 39

Rule - Electrons occupy orbitals of equal energy, one electron enters each orbital until all the orbitals contain one electron with parallel spin. Then the second electron then adds to each orbital so that their spin is paired and opposite in direction.

Answer 39

Hund

Question 40

the point of indivisibility

Answer 40

Atomos

Question 41

Changing one substance into another

Answer 41

Transmutation

Question 42

The range of frequencies (frequency of waves is continuous)

Answer 42

Electromagnetic Spectrum

Question 43

Energy from light in discrete/individual amounts/packets

Answer 43

Quantum

Question 44

Radiation is shone on a metal and results in flowing energy

Answer 44

Photoelectric Effect

Question 45

When white light is passed through a prism, it splits into its component colours

Answer 45

Spectroscopy

Question 46

Occurs when the electron emits a quantum of energy in the form of light equal to the change in energy level

Answer 46

Spectral Lines

Question 47

It is impossible to know both the position and the momentum of an object beyond a certain measure of precision (mathematically proved)

Answer 47

Uncertainty Principle

Question 48

Region of space where the electron is most likely to be found Isoelectronic - Atoms which have the same electron arrangements

Answer 48

Orbital (Electron Cloud)