People to Know #1
People to Know #2
People to Know #3
The Atom Notes
Atomic Theory Notes
100
Discovered oxygen and carbon dioxide
Who is Joseph Priestley?
100
He investigated emission spectra of heated elements, and with Gustav Kirchhoff discovered caesium (in 1860) and rubidium (in 1861). The Bunsen-Kirchhoff Award for spectroscopy is named after Bunsen and Kirchhoff
Who is Robert Bunsen?
100
Her achievements include the creation of a theory of radioactivity (a term she coined[2]), techniques for isolating radioactive isotopes, and the discovery of two new elements, polonium and radium. Under her direction, the world's first studies were conducted into the treatment of neoplasms (cancers) using radioactive isotopes
Who is Marie Curie?
100
Positively charged particles. All are identical.
What is Protons?
100
the smallest particle into which an element can be dividedand still be the same substance.
What is an atom?
200
Developed modern atomic theory
Who is John Dalton?
200
He is mainly known for simplifying the production of celluloid, the first industrial plastic
Who is John Wesley Hyatt?
200
known for the discovery of the covalent bond; In 1926, Lewis coined the term "photon" for the smallest unit of radiant energy; lewis dot diagrams showing bonding of atoms.
Who is Gilbert N. Lewis?
200
Neutral Charge. all are identical.
What is Neutrons?
200
atoms make up..
What is elements?
300
He is credited as being the creator of the first version of the periodic table of elements. Using the table, he predicted the properties of elements yet to be discovered.
Who is Dmitri Mendeleev?
300
The invention of Bakelite marks the beginning of the Age of Plastics[2]. Bakelite was made from phenol (then known as carbolic acid) and formaldehyde. These can be mixed, heated, and then either molded or extruded; Bakelite was the first plastic invented that held its shape after being heated. Radios, telephones and electrical insulators were made of Bakelite because of its properties of insulation and heat-resistance. Soon it penetrated nearly all branches of industry
Who is Leo Baekeland?
300
He is credited for the discovery of the electron and of isotopes, and the invention of the mass spectrometer.
Who is Joseph John "J. J." Thomson?
300
Negatively charged particles. Pretty much all are identical.
What is Electrons?
300
elements make up...
What is compounds?
400
He is known mostly for two laws related to gases, and for his work on alcohol-water mixtures, which led to the degrees Gay-Lussac used to measure alcoholic beverages in many countries
Who is Joseph Louis Gay-Lussac?
400
became known as the father of nuclear physics; Rutherford performed his most famous work after he received this prize. In 1911, he postulated that atoms have their positive charge concentrated in a very small nucleus,[3] and thereby pioneered the Rutherford model, or planetary, model of the atom; He is widely credited with first splitting the atom in 1917, and leading the first experiment to "split the nucleus" in a controlled manner by two students under his direction, John Cockcroft and Ernest Walton in 1932.
Who is Ernest Rutherford?
400
He is probably best remembered today for his discoveries of several alkali and alkaline earth metals, as well as contributions to the discoveries of the elemental nature of chlorine and iodine. Davy was a pioneer in the field of electrolysis using the voltaic pile to split up common compounds and thus prepare many new elements. He went on to electrolyse molten salts and discovered several new metals, especially sodium and potassium, highly reactive elements known as the alkali metals.
Who is Humphry Davy?
400
when an atom becomes a charged particle due to the difference in number between protons and electrons
What is Ions?
400
a unifying explanation for a broad range of hypotheses and observations that have been supported by testing
What is a theory?
500
Father of modern chemistry; He stated the first version of the law of conservation of mass,[2] recognized and named oxygen (1778) and hydrogen (1783); helped construct the metric system, wrote the first extensive list of elements, and helped to reform chemical nomenclature. He discovered that, although matter may change its form or shape, its mass always remains the same.
Who is Antoine Lavoisier?
500
stated that gases are composed of molecules, and these molecules are composed of atoms; the relative molecular mass of a gas can be calculated from the mass of sample of known volume; developed this hypothesis after Joseph Louis Gay-Lussac had published in 1808 the his law on volumes (and combining gases)
Who is Amedeo Avogadro?
500
the theory of structure provided dramatic new clarity of understanding, and a reliable guide to both analytic and especially synthetic work. As a consequence, the field of organic chemistry developed explosively from this point; idea of assigning certain atoms to certain positions within the molecule, and schematically connecting them using what he called their valences; benzene ring structure
Who is August Kekulé?
500
the number of protons.
What is Atomic Number?
500
all matter is made of ______, so atoms are considered the building blocks of matter
What is elements?