Atomic structure vocabulary

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Democritus was an influential Ancient Greek pre-Socratic philosopher primarily remembered today for his formulation of an atomic theory of the universe.
developed the atomic theory of matter
stated that atoms contain particles that have electrical charge
Ben franklin
Franklin was a renowned polymath and a leading author, printer, political theorist, politician, freemason, postmaster
J.J Thomson
discovered Atoms are made up of smaller particles
plum pudding model
Robert Andrews Millikan was an American experimental physicist honored with the Nobel Prize for Physics in 1923 for the measurement of the elementary electronic charge and for his work on the photoelectric effect.
Discovered protons
discovered radioactivity
Marie curie
a Polish and naturalized-French physicist and chemist who conducted pioneering research on radioactivity.
Pierre curie
French scientist and inventor that studied crystals and atoms
discovered the nucleus with his gold foil experiment.
Discovered the neutron
Arranged the periodic table by atomic number
Dalton’s atomic theory
1) All matter is made of atoms. Atoms are indivisible and indestructible. 3) Compounds are formed by a combination of two or more different kinds of atoms.
Cathode Ray tubes
supplied evidence of the existence of electrons.
Plum pudding theory
The Plum Pudding Model is a model of atomic structure proposed by J.J. Thomson in the late 19th century.
Oil drop experiment
The oil drop experiment was performed by Robert A. Millikan and Harvey Fletcher in 1909 to measure the elementary electric charge
Gold foil experiment
Rutherford’s Gold Foil Experiment proved the existance of a small massive center to atoms, which would later be known as the nucleus of an atom.
Nuclear atom theory
Rutherford overturned Thomson’s model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny and heavy nucleus.
Scanning tunneling microscope
a high-resolution microscope using neither light nor an electron beam, but with an ultrafine tip able to reveal atomic and molecular details of surfaces.
each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.
a thing that is composed of two or more separate elements; a mixture.
Alpha particle
Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium nucleus. They are generally produced in the process of alpha decay, but may also be produced in other ways.
Beta particle
high-energy, high-speed electron or positron emitted in the radioactive decay of an atomic nucleus, such as a potassium-40 nucleus, in the process of beta decay.
An atom is the smallest constituent unit of ordinary matter
Positive charge
A subatomic particle that has a negative charge
The neutron is a subatomic particle, symbol n or n0 , with no net electric charge and a mass slightly larger than that of a proton.
A charged atom
A positively charged ion
A negatively charged ion
Atoms of the same element that have different numbers of neutrons
Atomic number
the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
Mass number
the total number of protons and neutrons in a nucleus.
Categories: Atomic Physics