Inorganic Chemistry Flashcards
Post that all matter is made up of small indestructive units called atoms
Democritus
Postulated that all matter is made up of small indestructive units called atoms
Democritus
Who proposed the atomic theory and what are those?
John Dalton
1 . Each element is made up of atoms
2. Atoms of a given element are identical
3. Chemical reactions involve reorganization of the atoms.
4. Compounds are formed when atoms combine with each other.
Discovered that the properties of the element were periodic functions of their atomic weights
Dimitri Mendeleev
James Clark Maxwell
Theory of electromagnetism
Made connection between light and electromagnetic waves.
Proposed the termed “electron”.
Electricity was made of discrete negative particles.
George Stoney
Discovered that certain chemicals glowed when exposed to cathode rays
Discovered X-rays.
Wilhelm roentgen
Discovered radiation
Henri Becquerel
Determined the change to mass ratio of an election. What is the charge to mass ratio?
Joseph John Thomson
1.758820x10^11 C/kg
Wat did Pierre and Marie curie discovered?
Polonium and radium
Radioactive particles cause atoms to break down releasing radiation that takes the form of energy and subatomic particles.
Discovered alpha, beta, and gamma rays in radiation. Invented the Nuclear Model of the Atom (1904).
Ernest Rutherford
Proposed the idea of quantization to explain how a hot, glowing object emitted light. Originator of the quantum
theory (1900)
Max Planck
Max planck equation
E = hv
Coined the “isotope”
Margaret Todd
Found that noble gases have stable electron configuration
Richard Abegg
Photoelectric Effect (1905)
Created the theories of relativity and hypothesized about the particle nate of light “photon”
Albert Einstein
Determined the charge of electron through his Oil Drop Experiment. What is the charge of electron
Robert Millikan
1.602 x 10^ -19 C
Discovered that the number of protons in an element determines its atomic number
Henry Moseley
Proposed that electrons have a wave-particle duality
Louise de Broglie
Describes how the quantum state of a system changes with time
Erwin Schrodinger
A model where the atom is made up of negative electrons that float in a sphere of positive charge.
J.J. Thomson’s Plum Pudding Model
A model where most of the alpha particles went through the foil, but a few were deflected. Through this, Rutherford demonstrated that the atom has a tiny, heavy nucleus.
Rutherford’s Nuclear Model
Depicts atoms as small, positively charged nuclei surrounded by electrons in circular orbits.
Bohr’s Planetary Model
The middle element in certain triads had an atomic weight that was the average of the other two members. What law and who proposed?
Law of Triads by Johann Dobereiner
When elements are aligned according to their atomic weight, every eighth element shares similar properties. What law and who proposed?
Law of Octaves by John Newlands
Recognized the periodic behavior and studied the relationship of the atomic volume and the relative atomic mass of 28 elements. Who proposed?
Lothar Meyer
Formulated the Periodic Law. The properties of the elements are periodic functions of their atomic masses.
Dmitri Mendeleev
The last person in the timeline of the periodic table, where he used X-ray emissions and found that the ordering of the elements by atomic number
Henry Moseley
