WorksheetsAtomic Physics
Total questions: 13
Worksheet time: 13mins
Name
Class
Date
1.
In a stable atom the amount of electrons is electron is equal to
a)
neutrons
b)
protons
c)
atomic mass
d)
neutrons + protons
2.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
3.
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.
a)
Dalton's model of the atom
b)
The "Plum Pudding Model" of the atom
c)
The "Rutherford Model" of the atom
d)
The "Quantum Mechanical Model" of the atom
4.
This model added on to previous models by showing electrons existed at certain "energy levels". However it does not accurately show what those levels look like.
a)
The "Bohr Model" of the atom
b)
The "Rutherford Model" of the atom
c)
The "Plumb Pudding Model" of the atom
d)
The "Quantum Mechanical Model" of the atom
5.
This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.
a)
The "Plum Pudding Model" of the atom
b)
The "Rutherford Model" of the atom
c)
Democritus's model of the atom
d)
The "Quantum Mechanical Model" of the atom
6.
Ernest Rutherford discovered that atoms were mostly _________________.
a)
negatively charged
b)
positively charged
c)
electrons
d)
empty space.
7.
In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back. What did we conclude because of this?
a)
Atoms are small indivisible spheres
b)
Atoms are mostly empty space with a small, dense, positive center
c)
Atoms have negatively charged particles which orbit the nucleus
d)
Light is a wave, not a particle
8.
Discovered the electron using cathode ray tube
a)
Joseph Thomson
b)
John Dalton
c)
Ernest Rutherford
d)
Robert Millikan
9.
Discovered the nucleus
a)
Dalton's
b)
Robert Millikan
c)
James Chadwick
d)
Ernest Rutherford
10.
Alpha particles.....
a)
a) are positively charged.
b)
b) consist of two protons and four neutrons.
c)
c) can penetrate any thickness of matter
d)
d) All of the above
11.
Which model required the discovery of the electron?
a)
A.
b)
B.
12.
Atom is mostly empty space
a)
Dalton
b)
Thomson
c)
Rutherford
d)
Bohr
13.
Which of the following correctly describes the charge of beta particles and alpha particles?
a)
Alpha particles are positively charged, and beta particles are negatively charged.
b)
Alpha particles and beta particles are both negatively charged.
c)
Alpha particles are negatively charged, and beta particles are positively charged.
d)
Alpha particles and beta particles are both positively charged
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