Atomic Theory Flashcards
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)
EMPEDOCLES
He asserted that each element is associated with two distinct properties. Example, metal; iron is classified as earth and air.
EMPEDOCLES
supported Empedocles’ idea about the four elements and added a fifth one: Aether
Aristotle
This principle is also used by alchemists in their studies
Alchemy
a Greek philosophers who didn’t agree with the “Five Elements” theory.
Democritus
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
Democritus
The Movement that was Left Ignored
Atomism
He said that dubbed atomos (Gk. “undivided”), was stated to be the origin of all things
Democritus
used to transmute base metals such as iron and tin into “pure” metals such as gold and platinum.
Alchemy
intertwined their chemical endeavors with spiritual and mystical concepts, including the study of the five (fire, air, water, earth, and aether)
Alchemists
published his research in 1661, entitled The Sceptical Chymist (The Skeptical Chemist).
Robert Brown
used these to discover universal cures for all diseases and achieve longevity (or immortality)
Alchemy
Robert Brown published his research in 1661, entitled The
Sceptical Chymist (The Skeptical Chemist).
It is a theory where Elements are made up of small indivisible particles called ATOMS.
John Dalton; Law of Multiple Proportions
It encouraged scientists to conduct experiments and use the results to further develop chemistry.
Sceptical Chymist (The Skeptical Chemist).
He came up with a theory that marked the beginning of the modern era of chemistry.
John Dalton
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;
John Dalton; Law of Multiple Proportions
In this theory Atoms are conserved in chemical reactions – they are only rearranged, separated, or combined with other atoms
John Dalton; Law of Multiple Proportions
He is the man behind the findings of the composition of matter (1779)
Joseph Proust’s
John Dalton came up with a theory that marked the beginning of the modern era of chemistry, called?
John Dalton; Law of Multiple Proportions
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);
John Dalton; Law of Multiple Proportions
He proposed an important principle that quantitatively analyzed chemical reactions.
Joseph Proust’s
He suggested that the formation of compounds involves the combination of elements in similar proportions by mass regardless of the sample size.
Joseph Proust’s; Law of Definite Proportions
He asserted that all things are composed of 4 primal elements
Empedocles
He formed the Atomism Movement
Democritus
He proposed of Law of Definite Proportions
Joseph Proust
He formulated the Atomic Theory and proposed the Law of Multiple Proportions
John Dalton
The one who created the Periodic Table
Dmitri Mendeleev
He rearranged all known chemical elements in his time in a table based on its atomic masses
Dmitri Mendeleev
They observed that radioactivity causes some atoms to break down spontaneously
Antoine Becquerel and Marie Currie
he discovered X-ray
Wilhelm Rontgen
He discovered electrons
Joseph John Thompson
He proposed the “Plum-Pudding Atom Model”
Joseph John Thomson
An atom model where it says that the electrons are dispersed from atoms itself
Plum-Pudding Atom Model
An electron has a charge of??
-16022 x 10 -19 C (coulombs)
He found that An electron has a charge of -16022 x 10 -19 C (coulombs)
Robert MIlikan
He noted that the atoms are most space.
Ernest Rutherford
He discovered protons
Ernest Rutherford
He discovered neutrons
James Chadwick
He proposed the orbital or planetary atom model
Neils Bohr
solid sphere/billiard ball model of atom
Dalton’s atomic model
performed the Alpha Scattering gold foil experiment
Ernest Rutherford
