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Atomic Scientists

Scientists and their Atomic Discoveries

QuestionAnswer
Modern scientist that said all elements are made of tiny indivisible particles called atoms. Dalton
All atoms of a given element are identical in mass and properties. Dalton
Chemical reactions rearrange atoms but do not create, destroy, or convert atoms from one element to another. Dalton
Greek who thought there was no limit to the number of times matter could be divided. Aristotle
Greek who thought all matter consisted of extremely tiny particles that could not be divided. Democritus
Atoms are the smallest particle of an element. Dalton
Credited with discovering the electron J.J. Thomson
Plum pudding model J.J. Thomson
Claimed ❑The nucleus is small. ❑ The nucleus is dense. ❑ The nucleus is positively charged Basically discovered the nucleus. Rutherford
Said that the size of the atom comes mostly from the space occupied by the electrons. He believed the electrons traveled in orbits around the nucleus Bohr
The mass of the atom comes mostly from the nucleus. Bohr
Credited with discovering the proton. Rutherford
Gold foil experiment Rutherford
Cathode Ray tube experiment J.J. Thomson
He claimed electrons are very light and fast. They are not organized along orbits around the nucleus. Modern Atomic Theory
Except for mass, virtually every property of atoms is determined by electrons, including size and chemical bonding. Modern Atomic Theory
He devised the Quantum Mechanical Model of electrons as waves. Schrödinger
He postulated that positively charged protons and neutral neutrons bound together as the atom's nucleus, with negatively charged electrons occupying energy levels surrounding the nucleus. Chadwick
He is credited with discovering the neutron. Chadwick
Popular Physical Science sets

 



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