Chemistry chapter 4: automic structure Practice Questions And Well Elaborated Answers.
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Course
AUTOMIC
Institution
AUTOMIC
Democritus's atomic philosophy - correct answer - atoms were indivisible and indestructible
- philosophers like Plato and Aristotle disagreed saying that everything was made out of the basic elemets
Dalton's Atomic Theory - correct answer 1) elements are composed of atoms.
2) atoms ...
Democritus's atomic philosophy - correct answer - atoms were indivisible and indestructible
- philosophers like Plato and Aristotle disagreed saying that everything was made out of the basic
elemets
Dalton's Atomic Theory - correct answer 1) elements are composed of atoms.
2) atoms of same element are identical, but differ from other elements.
3) elements can physically mis together to form mixtures or chemically combine in whole number ratios
to form compound s
4) chemical reactions occur when atoms are separated, joined, or rearranged
How to see individual atoms - correct answer scanning tunneling microscopes
JJ Thomson - correct answer discovered the electron using the cathode ray tube in 1897
cathode ray tube - correct answer - class tube with a cathode and an anode that is hooked up to a
high voltage battery
- Thomson little rays going from cathode to anode
- electrically charged plates and magnets would bend the stream of electrons
Robert Millikan - correct answer - discovered charge of electron
- discovered the mass of electrons in 1916
Eugen Goldstein - correct answer - discovered protons
- used a cathode ray tube and say that there were particles going towards the cathode as well, which
meant they were positive
James Chadwick - correct answer - Discovered the neutron in 1932
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