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Chemistry Unit 2 Review Flashcards | StudBud
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Chemistry Unit 2 Review
Chemistry Unit 2 Review
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1
All radioisotopes have the same half-life.
False
True
2
Ts
-
would have how many electrons?
117
116
118
3
The Periodic Table is organized based on which number?
average atomic mass
electronegativity
atomic
mass
4
The Mass Number includes the protons and electrons.
True
False
5
Sr
2+
would have how many electrons?
38
36
40
6
The chain reaction occuring in a nuclear reactor is controlled by catching excess neutrons by control rods in....
neutron release
neutron absorption
neutron decay
neutron moderation
7
Beta decay releases a(n)...
helium nucleus
electron
photon
8
Gamma must always pair up with beta or alpha in order for transmutation to occur.
True
False
9
How many neutrons are present in N-14 and N-15 respectively?
7;8
8;8
7; 7
8;7
10
How many neutrons are in Co-59?
32
91
30
59
11
Who 'discovered' the proton but didn't know it?
Rutherford
Becquerel
Chadwick
Goldstein
12
Complete the nuclear decay:
β or 0-1e
γ or 00γ
α or 42 He
13
The electron's mass and charge was discovered by...
Goldstein
Thomson
Millikan
Chadwick
14
Which characteristic does NOT describe Fission?
free neutrons are used to split the larger nucleus
intiated and propagated by a chain reaction
must occur at incrediably high temperatures
only viable nuclear energy at the moment
15
Which of the following is NOT a reason Fusion Power Plants are not in operation yet?
reaction cannot be controlled by any man-made structure
reactions only occurs at thermonuclear temps
only deutrium and tritium are thought to be fusionable
money is hard to come by for research
16
Radiation is all around you all the time!
True
False
17
Cations gain electrons so they have a negative charge.
False
True
18
Which statement of Dalton's Atomic Theory still holds true today?
Atoms of the same element are identical.
All elements are composed of tiny, indivisible atoms.
Atoms can chemically combine in whole number ratios to form compounds.
Atoms of one element can not change into atoms of another type of element.
19
Average Atomic Mass uses the atomic mass and % abundance of each isotope in the formula: (m
1
x %
1
) + (m
2
x %
2
) + etc.
True
False
20
What is the atomic number for Vanadium (V)?
23
51
50.94
5
21
The electron was discovered by...
Goldstein
Chadwick
Millikan
Thomson
22
What is the atomic make-up of Li
+
?
3 protons; 4 neutrons; 3 electrons
4 protons; 2 neutrons; 3 electrons
3 protons; 4 neutrons; 2 electrons
2 protons; 3 neutrons; 4 electrons
23
Spent fuel rods of a nuclear reactor are kept in all of the following EXCEPT...
open air
dry casks
deep underground
water tanks
24
The unit for Average Atomic Mass is...
g
%
amu
L
25
Complete the nuclear decay:
0-1e & 00γ
00γ & 00γ
42 He & 00γ
26
The isotopes of an element differ based on the number of neutrons in the nucleus.
True
False
27
Which dead scientist accidently discovered radiation?
Goldstein
Democritus
Becquerel
Curies
28
Complete the nuclear decay:
α or 42 He
β or 0-1e
γ or 00γ
29
The Atomic Mass of Cobalt (Co) is....
58.933
9
27
59
30
Who was the first person to theorize the existance of the atom?
Dalton
Thomson
Democritus
Rutherford
31
Who discovered the neutron?
Archimedes
Curies
Becquerel
Chadwick
32
Which type of radioactivity is the weakest?
beta
gamma
alpha
33
What is the average atomic mass of: Ne-20: 19.99 amu and 90.48%; Ne-21 = 20.99 and 0.27%; Ne-22 = 21.99 and 9.25%
20.2 amu
20.1777 amu
20.18 amu
20. amu
34
Radiation as we know it is based on what was learned by...
Bohr
Schrodinger
Einstein
the Curies
35
Who is actually given credit for discovering the proton?
Chadwick
Curies
Rutherford
Becquerel
36
After 1 half-life, how much of a 40 g sample would you have?
30 g
0 g
10 g
20 g
37
What is the smallest particle of an element that maintains it's identity in a chemical reaction?
neutron
electron
proton
atom
38
Pb-210 has a half life of 22 years. How much of a 99g sample would be left if 66 years has passed?
12.4 g
12 g
12.38 g
12.375 g
39
Which type of nuclear energy separates a larger nucleus into smaller halves?
Fission
Fusion
40
From the Gold Foil Experiment, Rutherford concluded all of the following EXCEPT...
neutrons existed in the nucleus too
atomic nucleus was positively charged
protons are equal in charge to electrons
most of the atom was empty space
41
A radioisotope forms when ___ & ___ are way out of balance.
neutrons; protons
electrons; neutrons
protons; electrons
42
The nucleus of an atom is mainly held together by the actions of the proton.
True
False
43
While the Mass Number of Cobalt (Co) is....
27
9
58.933
59
