WorksheetsHistory of the Atom
Total questions: 12
Worksheet time: 7mins
Name
Class
Date
1.
Who was the first person to come up with the Atomic Theory which included four parts.
a)
John Dalton
b)
Democritus
c)
Ernest Rutherford
d)
Niels Bohr
2.
Who developed the Quantum Mechanical Model?
a)
Erwin Schrodinger
b)
Joseph Thomson
c)
James Chadwick
d)
Ernest Rutherford
3.
Who discovered that the nucleus contains positively charged particles called protons?
a)
Ernest Rutherford
b)
James Chadwick
c)
Democritus
d)
Niels Bohr
4.
Who discovered the electron?
a)
Niels Bohr
b)
Democritus
c)
Joseph Thomson
d)
John Dalton
5.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
6.
The central region of an atom where neutrons and protons are located is the __________________.
a)
nucleus
b)
electron cloud
c)
core
d)
center
7.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
8.
Matter always has mass.
a)
true
b)
false
9.
Worked with Rutherford to discover particles with no charge -- called neutrons.
a)
James Chadwick
b)
Niels Bohr
c)
Democritus
d)
Thomson
10.
Used the word "atomos" to decsribe the uncuttable (indivisible) atom.
a)
Democritus
b)
Thomson
c)
Bohr
d)
Dalton
11.
Proposed that electrons move around the nucleus in specific layers, or shells.
a)
Bohr
b)
Rutherford
c)
Chadwick
d)
Thomson
12.
This picture best represents ___________________ atomic model.
a)
Thomson's
b)
Dalton's
c)
Bohr's
d)
Chadwick's
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