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History of the Atom
History of the Atom
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Questions
34
Answers
1
What was Rutherford's conclusion?
There must be a positive nucleus middle of the atom.
Atoms are strange.
My experiment was a failure.
Atoms are not solid.
2
What makes all isotopes of an element different?
electrons
neutrons
protons
nucleus
3
What did Dalton think an atom looked like?
A round circle
A solid pyramid
A solid cube
A solid sphere
4
Did Dalton think that an atom could be split up?
Yes
No
5
What makes all elements different from each other?
electrons
protons
charge
neutrons
6
What does 32 in sulfur-32 mean?
number of protons
atomic mass
atomic number
mass number
7
What was Rutherford's model of the atom called?
Bohr Model
Nuclear Atom
Plum Pudding
Quantum Mechanical model
8
What type of particles did Rutherford use in his experiment?
Electrons
Alpha particles
Beta particles
Gamma particles
9
Who discovered the quantum mechanical model of the atom?
Millikan
Rutherford
Schrodinger
Bohr
10
Who was the first person to suggest the idea of atoms
John Dalton
Democritus
Ernest Rutherford
Jimmy Neutron
11
What do we call the bit in the middle of an atom?
nuclear
neutron
nucleus
nucleolus
12
Who proved Thomson's model wrong?
Rutherford
Millikan
Chadwick
Dalton
13
How many neutrons does Barium-137 (atomic number 56) have?
137.33
81
137
56
14
What did Earnest Rutherford use to test out the plum pudding model?
Silver foil
Gold foil
Tin foil
Aluminium foil
15
Which model of an atom was put forward by JJ Thompson?
The snooker ball model
The plum pudding model
The billiard ball model
The chocolate pudding model
16
What is true about subatomic particles
protons are the lightest
electrons are the heaviest
mass of proton = mass of neutron
neutrons are the lightest
17
Which of the following is correct?
The protons was discovered by Thomson in 1880.
The electrons was discovered by Goldstein in 1886.
The neutron was discovered by Chadwick in 1932.
Cathode rays were found to be made of protons.
18
The quantum mechanical model of the atom
no longer requires the concept of energy levels.
gives the probability of finding an electron.
defines the exact path of an electron.
was proposed by Neils Bohr.
19
Where were the electrons in the plum pudding model?
Spread evenly throughout the atom
Around the outside of the atom
At the top of the atom
In the middle of the atom
20
Who discovered the charge and mass of an electron?
Millikan
Thomson
Rutherford
Chadwick
21
Who discovered the proton?
Thomson
Millikan
Goldstein
Chadwick
22
How many protons does Barium-137 (atomic number 56) have?
137.33
56
81
137
23
What actually happened in Rutherford's experiment?
They were all absorbed by the atom.
The alpha particles all went through.
Nothing
Some went through and others bounced back.
24
Give the number of p
+
, n
o
, e
-
if atomic number is 26 and mass number is 56.
56 p+, 30 no, 56 e-
76 p+, 26 no, 76 e-
26 p+, 30 no, 26 e-
26 p+, 56 no, 26 e-
25
Why didn't people believe Democritus' theory about atoms?
No scientific evidence
atoms don't exist
Democritus was a democrat
He was stupid
26
Who discovered the neutron?
JJ Thomson
Jimmy Neutron
Ernest Rutherford
James Chadwick
27
What do we call particles that are inside the atom?
Intra-atomic particles
Sub-atomic particles
super particles
Inter-atomic particles
28
Who discovered the charge and mass of an electron?
Millikan
Chadwick
Thomson
Dalton
29
Calculate the atomic mass of lithium if Li-6 is 4% abundant and Li-7 is 96% abundant.
7
6.941
3
694.1
30
Which model of the atom is thought to be true?
p+, e- and no are spaced evenly through the atom
e- are around the nucleus and take up most of the volume
the nucleus is made of electrons and protons
the nucleus is made of protons, neutrons and electrons
31
What was wrong with Dalton's atomic theory
atoms are tiny indivisible particles
atoms of one element are different from another element
compounds are made by combining atoms
atoms combined in simple whole number ratios
32
Which is correct?
Zn, 30 protons, 60 electrons
In, 49 protons, 49 electrons
Cs, 55 protons, 132.9 electrons
F, 19 protons, 19 electrons
33
What is inside the nucleus?
electrons
protons and neutrons
neutrons
protons
34
What made JJ Thompson think that the electrons were inside the atom?
He guessed
cathode rays were attracted to positive plates
He saw them
They had less mass than the atom
