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This model was the first to show a nucleus, consisting of protons and neutrons. Electrons surround the nucleus but are not shown in distinct energy levels.
Planetary model or Rutherford's model
This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. It shows electrons floating freely in a positive region.
The "Plum Pudding Model" of the atom
Ernest Rutherford discovered that atoms were mostly
Empty space
Which scientist proposed the "plum pudding model" of the atom?
J.J. Thompson
Who was the first to propose that matter consist of indivisible particles of matter called atoms?
Democritus
In the atomic model nicknamed the "plum pudding" model, what do the plums represent?
Electrons
What is the meaning of the greek word "atomos"?
Indivisible or uncuttable
Who were the scientists that proposed a highly dense nucleus surrounded by electron clouds?
Schrodinger, Heisenberg and Louis De Broglie
This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.
Democritus model
Aristotle and other early Greek philosophers thought that matter was composed of four elements: air, earth, fire, and water(T/F)
True
Dalton developed the first scientifically tested atomic theory. (T/F)
True
Who was the first person to "think" of an atom?
Democritus
Which one of these is Dalton's Model?
Which model was created after the discovery of the nucleus?
B
Which model was created after the discovery of the electron cloud?
C
Which scientist proposed that all matter is composed of atoms, which he assumed were indivisible and indestructible building blocks of nature.
John Dalton
