History of the periodic table / electron configuration / atom

0.0(0)
studied byStudied by 0 people
GameKnowt Play
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/18

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

19 Terms

1
New cards

atom

is a basic unit of matter and the smallest unit of an element that retains the elements chemical properties.

2
New cards

Solid sphere / billiard ball model

  • By John Dalton

  • STRENGTH: Recognised that atoms of a particular element differ from other elements.

  • WEAKNESS: atoms are not indivisible - they’re composed from subatomic particles.

<ul><li><p>By John Dalton</p></li><li><p>STRENGTH: Recognised that atoms of a particular element differ from other elements.</p></li><li><p>WEAKNESS: atoms are not indivisible - they’re composed from subatomic particles.</p></li></ul><p></p>
3
New cards

Plum pudding model

  • by JJ Thompson

  • STRENGTH: recognised electrons as components of atoms

  • WEAKNESS: No nucleus, and did not explain later experimental observations.

<ul><li><p>by JJ Thompson</p></li><li><p>STRENGTH: recognised electrons as components of atoms</p></li><li><p>WEAKNESS: No nucleus, and did not explain later experimental observations.</p></li></ul><p></p>
4
New cards

Nuclear Model

  • by Ernest Rutherford

  • STRENGTH: Realised that positive charge was located in the nucleus of an atom.

  • WEAKNESS: Did not explain why electrons remain in orbit around the nucleus

<ul><li><p>by Ernest Rutherford</p></li><li><p>STRENGTH: Realised that positive charge was located in the nucleus of an atom.</p></li><li><p>WEAKNESS: Did not explain why electrons remain in orbit around the nucleus</p></li></ul><p></p>
5
New cards

Planetary Model

  • by Bohr

  • STRENGTH: proposed stable electron orbits ; explained the emission spectra of some elements.

  • WEAKNESS: Moving electrons should emit energy and collapse into the nucleus ; model did not work well for heavier atoms.

<ul><li><p>by Bohr </p></li><li><p>STRENGTH: proposed stable electron orbits ; explained the emission spectra of some elements.</p></li><li><p>WEAKNESS: Moving electrons should emit energy and collapse into the nucleus ; model did not work well for heavier atoms.</p></li></ul><p></p>
6
New cards

Electron Cloud Model / Quantum Model

  • By schrodinger

  • STRENGTH: shows that electrons dont move around the nucleus in orbits, but in clouds where their position is uncertain.

<ul><li><p>By schrodinger</p></li><li><p>STRENGTH: shows that electrons dont move around the nucleus in orbits, but in clouds where their position is uncertain.</p></li></ul><p></p>
7
New cards

Protons

positively charged particles located in the nucleus

8
New cards

Neutrons

Neutral particles (no charge) located in the nucleus.

9
New cards

Electrons

Negatively charged particles that orbit the nucleus

10
New cards

Aristotle

  • 300 BC

  • a greek philosopher who proposed that everything on earth was made up of Earth, Water, Fire and Air.

<ul><li><p>300 BC</p></li><li><p>a greek philosopher who proposed that everything on earth was made up of Earth, Water, Fire and Air.</p></li></ul><p></p>
11
New cards

Hennig Brand

  • 1669

  • an Alchemist searching for the Philosopher’s stone

  • He was the first to discover a new element: Phosphorus

<ul><li><p>1669</p></li><li><p>an Alchemist searching for the Philosopher’s stone</p></li><li><p>He was the first to discover a new element: Phosphorus</p></li></ul><p></p>
12
New cards

Antoine de Lavoisier

  • 1789

  • He published the Traite Elementaire de Chimie (Elementary Treatise of Chemistry)

  • He classified the elements based on their properties

<ul><li><p>1789</p></li><li><p>He published the Traite Elementaire de Chimie (Elementary Treatise of Chemistry)</p></li><li><p>He classified the elements based on their properties</p></li></ul><p></p>
13
New cards

Johann Wolfgang Dobereiner

  • 1817

  • He noticed that some elements could be grouped into triads w/ similar properties and atomic weights

  • Elemental triad

<ul><li><p>1817</p></li><li><p>He noticed that some elements could be grouped into triads w/ similar properties and atomic weights</p></li><li><p>Elemental triad</p></li></ul><p></p>
14
New cards

Alexandre - Emilie Béguyer de Chancourtois

  • 1862

  • proposed a spiral arrangement of the elements, where similar elements appeared at a regular intervals.

  • first attempt to arrange in increasing periodicity of the elements.

  • telluric helix

<ul><li><p>1862</p></li><li><p>proposed a spiral arrangement of the elements, where similar elements appeared at a regular intervals.</p></li><li><p>first attempt to arrange in increasing periodicity of the elements.</p></li><li><p>telluric helix</p></li></ul><p></p>
15
New cards

John Newlands

  • 1864

  • He arranged the elements by atomic weight

  • created the Law of Octaves

  • classified the elements according to physical properties and noticed that there is difference of multiples of eights in the atomic weight.

<ul><li><p>1864</p></li><li><p>He arranged the elements by atomic weight</p></li><li><p>created the Law of Octaves</p></li><li><p>classified the elements according to physical properties and noticed that there is difference of multiples of eights in the atomic weight.</p></li></ul><p></p>
16
New cards

Dmitri Mendeleev

  • 1869

  • Organized the known elements by atomic weight and chemical properties.

  • He published the first periodic table

  • He arranged them in increasing atomic weight leaving spaces for undiscovered elements.

<ul><li><p>1869</p></li><li><p>Organized the known elements by atomic weight and chemical properties.</p></li><li><p>He published the first periodic table</p></li><li><p>He arranged them in increasing atomic weight leaving spaces for undiscovered elements.</p></li></ul><p></p>
17
New cards

William Ramsey

  • 1890

  • He included the noble gases : Argon, Helium, Neon, Krypton and Xenon

<ul><li><p>1890</p></li><li><p>He included the noble gases : Argon, Helium, Neon, Krypton and Xenon</p></li></ul><p></p>
18
New cards

Henry Moseley

  • 1913

  • he rearranged the elements according to increasing atomic number

<ul><li><p>1913</p></li><li><p>he rearranged the elements according to increasing atomic number</p></li></ul><p></p>
19
New cards

Glenn Seaborg

  • 1940 - 1950

  • Transuranium elements

  • Introduced the actinide series

<ul><li><p>1940 - 1950</p></li><li><p>Transuranium elements</p></li><li><p>Introduced the actinide series</p></li></ul><p></p>