WorksheetsHistory of Atomic Theory
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Democritus believed that the smallest particles, were atomos, the Greek word for
a)
small
b)
uncut or indivisible
c)
basic
2.
Earth, Air, Fire, and Water were the fundamental elements propose by ___.
a)
Aristotle
b)
Democritus
c)
Plato
d)
Galileo
3.
John Dalton stated:
a)
Atoms are tiny, indivisible particles (uncuttable).
b)
Atoms of one element are all the same.
c)
Atoms of different elements are different.
d)
All of the statements listed.
4.
Was John Daltons theory earlier than Niels Bohr?
a)
No
b)
Yes
5.
What was the name of J.J Thomsons' model of atomic structure.
a)
Electron Cloud Model
b)
Electron Sea Model
c)
Plum Pudding Model
d)
Bohr Model
6.
In the Thomson Model, he discovered the existence of what particle?
a)
Electrons
b)
Protons
c)
Neutrons
d)
Quarks
7.
Who proposed that the atom consists mostly of empty space?
a)
Bohr
b)
Dalton
c)
Rutherford
d)
Chadwick
8.
Rutherford’s experiment determined that the nucleus of an atom is tiny, dense and ______ charged.
a)
neutrally
b)
negatively
c)
positively
9.
What does the Bohr model suggest?
a)
Atoms are small, hard, indivisible objects.
b)
That protons in the nucleus are attracted to electrons in the electron clouds.
c)
That electrons travel around the nucleus of an atom in orbits or definite paths.
10.
In the most current Atomic Model: Electrons can be found here
a)
in the circles within the atom
b)
in the nucleus
c)
in Electron Clouds
100 %
