WorksheetsChem - Chapter 4 Review
Total questions: 34
Worksheet time: 17mins
Name
Class
Date
1.
Fission is
a)
A reaction where two atoms make a molecule
b)
A reaction where an atom splits into two atoms
c)
A reaction where two atoms become one
d)
A liquid substance
2.
Fusion is
a)
A reaction where two atoms make a molecule
b)
A reaction where an atom splits into two atoms
c)
A reaction where two atoms become one
d)
A liquid substance
3.
The atomic number tells us
a)
The number of protons
b)
The number of electrons
c)
The number of neutrons
d)
The mass
4.
The atomic mass is
a)
The same as the atomic number
b)
The weight of 1 atom
c)
The average mass of the isotopes of an element
d)
The sum of all of the elements masses in g
5.
An ion has a differing number of
a)
protons
b)
neutrons
c)
electrons
d)
Gamma rays
6.
An isotope has a differing number of
a)
protons
b)
neutrons
c)
electrons
d)
Gamma rays
7.
The atomic mass of Potassium is
a)
39 amu
b)
19
c)
19 amu
d)
39
8.
amu stands for
a)
atoms, mass and us
b)
atomic mass unit
c)
atomic metric unit
d)
atoms make unicorns
9.
Magnesium has ________ neutrons
a)
12
b)
24.36
c)
24
d)
12.36
10.
Iron has _____ protons
a)
26
b)
56
c)
30
d)
none
11.
Ti+3 is a
a)
isotope
b)
ion
c)
neutral atom
d)
element
12.
The notation 234U tells us
a)
That Uranium is an isotope with a mass of 234 amu
b)
That Uranus has a weight of 234 kg
c)
That Uranium is an ion
d)
nothing special about the atom
13.
John Dalton's model of the atom
a)
was the first
b)
said that the atom was an indivisible sphere
c)
said that atoms were the smallest unit of matter
d)
all of these are true
14.
J. J. Thomson's model of the atom
a)
was a solid sphere only
b)
had charges
c)
had electrons in orbits
d)
introduced the nucleus
15.
Ernest Rutheford's model of the atom
a)
was a solid sphere only
b)
had charges
c)
had electrons in orbits
d)
introduced the nucleus
16.
The Bohr model of the atom
a)
was a solid sphere only
b)
had charges
c)
had electrons in orbits
d)
introduced the nucleus
17.
Scrodinger's model of the atom is based on
a)
probability of where electrons will be
b)
the cathode ray tube experiment
c)
the gold foil experiment
d)
the law of definite proportions
18.
Thomson's model of the atom is based on
a)
probability of where electrons will be
b)
the cathode ray tube experiment
c)
the gold foil experiment
d)
the law of definite proportions
19.
We can test for the presence of ions in a solution by
a)
seeing it change color
b)
by seeing it bubble
c)
by seeing it crystalize
d)
by seeing it conduct electricity
20.
Salt conducts electricity in water. This tells us that
a)
salt is made of ions
b)
salt has no ions
c)
water is conductive
d)
water is made of ions
21.
A nuclear reaction
a)
changes the number of electrons in an atom
b)
changes the nucleus
c)
releases very little energy
d)
is always very safe
22.
Nuclear decay causes an element to change into another element.
a)
True
b)
False
23.
Radioactive substances glow because of
a)
alpha particles
b)
beta particles
c)
neutron emission
d)
gamma radiation
24.
A half life is
a)
when half the mass of an element is used up
b)
the time it takes for half of an isotope to decay
c)
half of life around the material dies
d)
half of the mass is gone
25.
Nuclear energy can be used for
a)
producing electricity
b)
medicine
c)
explosives
d)
all of these
26.
The word radioactive comes from Marie Curie's discovery of Radium.
a)
True
b)
False
27.
Radioactive materials are
a)
stable
b)
unstable
c)
useless
d)
safe
28.
Calcium has ________ electrons
a)
20
b)
40
c)
20.7
d)
the same as Potassium
29.
Br-1 has __________ electrons.
a)
35
b)
80
c)
36
d)
45
30.
8Li has _________ neutrons.
a)
3
b)
7
c)
8
d)
5
31.
A solution is concentrated. That means
a)
it has a lot of solution
b)
it has a lot of solute
c)
it has a lot of solvent
d)
is dilute
32.
Dilute means
a)
a high proportion of solute to solvent
b)
A high proportion of solvent to solute
c)
A low proportion of solution to water
d)
A low proportion of solvent to solute
33.
A solution is
a)
a mixture of metals
b)
a liquid mixture
c)
a mixture of gasses
d)
a pure substance
34.
A solvent is
a)
the liquid in a solution
b)
the solid in a solution
c)
the thing that makes it conductive
d)
a gas in a solution
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