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Regents level chemistry questions
Flashcards
35 cards
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Practice quiz
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Questions
35
Answers
1
thomson knew electrons were negative because
they were attracted to the positive end of the magnet
they were repelled by the positive end of the magnet
they were attracted to the negative end of the magnet
they were not affected by the magnet
2
What is the new element formed when cesium-137 undergoes beta decay?
cesium-133
cesium-137
barium-133
barium-137
3
how many protons are in Potassium
20
10
19
39
4
what is the change in mass number when an atom emits a beta particle?
decrease by 2
increase by 1
decrease by 1
remain the same
5
Nuclear fusion
takes place in the sun
can be controlled in the laboratory
takes place at home
is used in medicine
6
who states that the nucleus postively charged and dense
goldstein
rutherford
dalton
bohr
7
Same element with different amounts of neutrons
ions
atomic number
element
isotopes
8
Conversion of an atom of one element to an atom of another element
alpha particle
transmutation
positron
transuranium element
9
who discovered radiation?
geiger
dalton
thomson
becquerel
10
If you stood behind a big sheet of paper. This would protect you from
gamma radiation
you're untouchable
beta radiation
alpha radiation
11
calculate the average atomic mass for zinc-64 which occurs 53.76 % and zinc-66 occurs 46.24%
6500 amus
67 amus
65000 amus
65 amus
12
To what element does radon-222 when it emits an alpha particle?
lead-204
lead-210
polonium-218
radon-214
13
cadmium control rods are used to
Slow the reaction by slowing the neutrons
slow the reaction by absorbing neutrons
to look pretty
speed up the reaction
14
Which of the following is not true about dalton's atomic theory
atoms are the same for one element
atoms can rearrange, combine and split into new molecules
atoms are indivisible
atoms combine in whole number ratios
15
Who discovered the most accurate view of the atom today
dalton
rutherford
Schrodinger
bohr
16
what is the change in atomic number when an atom emits an alpha particle?
decrease by 1
increase by 2
decrease by 2
increase by 1
17
A change in the nucleus of an atom that converts the atom from one element to another element:
polymerization
combustion
transmutation
neutralization
18
Combination of two nuclei to form a nucleus of greater mass:
fission
fusion
neutron absorption
neutron moderation
19
Which particle has the least mass?
proton
alpha
beta
neutron
20
This scientist discovered the electron
Rutherford with the gold foil experiment
Thomson with the gold foil experiment
thomson with the cathode ray tube
rutherford with the cathode ray tube
21
Splitting of nucleus into smaller fragments:
fission
fusion
radioisotopes
neutron moderation
22
Particle of charge +1 and mass equal to that of an electron:
beta particle
positron
gamma radiation
alpha particle
23
What is the change in atomic number when an atom emits a beta particle?
decrease by 1
decrease by 2
increase by 2
increase by 1
24
High energy photons emitted by a radioisotope:
positron
gamma radiation
alpha particle
beta particle
25
In which type of reaction do two lighter nuclei combine to form one heavier nucleus?
nuclear fission
nuclear fusion
combustion
reduction
26
If I live to be 90, what would my half life be?
55
45
90
50
27
how many neutrons does Aluminum-27 have?
27
13
14
26
28
what takes up most of the space in an atom
electrons
quarks
neutrons
empty space
29
Which nuclear emission has the greatest mass and the least penetrating power?
beta
alpha
positron
neutron
30
Element with unstable nucleus:
radioisotope
fusion
scintillation counter
geiger counter
31
what determines the identity of the atom
number of neutrons and protons
number of protons
number of electrons
number of neutrons
32
what is the change in atomic number caused by the emission of gamma radiation?
decrease by 1
decrease by 2
remain the same
increase by 1
33
The hand would stop which particle?
beta
alpha
gamma
all of them
34
Which particle is emitted in alpha radiation?
electron
helium nucleus
photon
hydrogen nucleus
35
The picture on the left is_____ and the right is _____?
both are how bombs are made
fusion, fission
fission,fusion
both
