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Fluorine has an atomic number of 9 What can you conclude
about an atom of fluorine from this fact’
6
-4’
If a hydrogen atom has 1 proton, 1 electron, and 1 neutron,
its atomic number is:
A
It has nine protons
B
It weighs nine grams
c
It has nine electron shells
A’
B2
D
It has a boiling point of 9 degrees Celsius
C3
2
D4
In what part of an atom can protons be found?
7 On the periodic table, how is atomic mass represented?
A
Inside the electrons
B
Inside the neutrons
A
As an average of the mass of different isotopes
C
Inside the atomic nucleus
B
As the exact mass of every atom
D
Inside the electron shells
C
As the mass of the most common isotope
D
As the masses of all the protons added together
3
Since atoms are very small, what can you infer about atomic
mass units?
8
What do carbon-12 and carbon-14 have in common?
A
One atomic mass unit is equivalent to a gram
B
One atomic mass unit is much lighter than a gram
A
They have the same number of protons
c
One atomic mass unit is much heavier than a gram
B
They have the same number of neutrons
D
Atomic mass units and grams measure different properties
C
They have the same atomic mass
An atom of fluorine has an atomic mass of 19 u. Keeping in
mind that its atomic number is 9, what can you infer about
this atom?
It has nine neutrons
D
They have the same atomic weight
4
A
9
How is carbon-1Z different from carbon-14?
B
It has ten electrons
A
They have a different number of protons
C
It has ten neutrons
B
They have a different number of electrons
D
It has ten protons
C
They have a different number of neutrons
D
They are different elements
5
If a sulfur atom has 16 protons, 16 electrons, and 16
neutrons, its atomic mass is:
10
A16
What can you conclude about carbon-14 from its name?
632
A
It has 14 electrons
C48
B
It has 14 neutrons
64
C
It has 14 protons
D
It has an atomic mass of 14 u
D
-
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Atomic and Molecular Structure CST Test Rele
ase Questions 4notebook
LI
Periodic Table of the Elements
LI
February 28, 2013
Generally, how do atomic mases
thrnnghaut the periodic table of the elements?
They increase from left to right and
top to bottom
WHHH
Which of the f$lowing ordered pairs of
lemens shows an increase in atomic number
but a decrease in average atomic mass?
A
AgtoPd
II
They increase from left to right and
bottom to top.
C
Theyincreasefromrighttoleftand
top to bottom.
1)
They increase from right to left and
bottom to top.
LI
Periodic Table of the Elements
çB) Co to Ni
C
GetoSn
1)
Cr to Mo
*
Why is cobalt tCo placed before nickel 4N1) on
the periodic table of the denients een though it
has a higher aerage atomic mass than nickel?
A
J
Nickel has one more proton
l
Cobalt was discovercd first.
C
Nickel has fewer electrons.
I)
Cobalt has a lower density.
LI
Te
HI I H
Iodine would hwe chemical properties most
like
A
maneanese
II
teihirium Te).
chlorine (Cl).
D
xenon(Xe).
I
Atomic and Molecular Structure CST Test Release Questions 4notebook
Which of the following elements i, classified
February 28, 2013
Which of the following atoms has the brg&
atomic radius?
() barium (Ba)
A
bromine
II
helium
l
chlorine (Cl)
U
sulfur
C
iodlncb
lithium
I)
magnesium (Mg)
Which of the ftilknving atoms has six valence
x
electrons?
I
W
w
Atomic numbor ncruas9s —.
The chart above shows the relationship between
the fast ioniiation energy and the increase in
atomic numbet The letter on the than tr the
iIkali family of elements is
I)
argon(Ar)
Which statement btsi describcs the density of
a atoms nucleus?
A
The nucleus occupies most of the atoms
volume but contains little of its mass.
B
The nucleus occupies ‘very little of the atom s
volume and contains little of its mass.
C
The nucleus occupies most of the aaoms
volume and contains most of its niass
() W.
B
c
X
y
!J
Z.
( I) i The nucleus occupies very little ol the atoms
volume but contains most of its mass.
2
_
Atomic and Molecular Structure CST Tes
t Release Questions 4.notebook
February 28, 2013
Results of Firing Alpha Particles at Gold Foil
Observation:
Alpha particles went straight
tflrogn_gold_fail
Alpha pamc es weni ttiroucfri ‘eld
II but vee efcted i larçe ang’es
Ipra articIes botinced oft cd fo
Proportion
>
93%
I
0 01
What informt ion do the experimental rrsults
ahoiie reeaI ihnui the nuckus of the gold
atom?
The nucleus contains less than half the mass
of the atom.
(B
C
1)
)
Why are enormous amounts of energy requir
to separate a nucleus into its component
protons and neutrons even though the proton
in the nucleus repel each other?
The nucleus is small and is the densest pan of
the atom.
The nucleus contains small positive and
negative particics.
The nucleus is laxgc and occupies most of the
atoms pacc.
B
C
The force of the protons repelling each oths
is small compared to the aftraction of the
neutrons to each other.
The electrostatic forces actmg bcicen 0th4
atoms lowers the force of repulsion of the
protons.
The interactions between neutrons and
electrons neutralize the repulsive forces
between the protons.
(D) The forces holding the nucleus together are
much stronger than the repulsion between t
protons,
3
__
__
February 28, 2013
Atomic nd Molecular Structure CST Test Release Questions 4.notebook
decay .i’f pi4oniwn.213?
The most abundant isotope of lead contains
2 protons and 124 neutrons paeked cksety
tngether in the nudeus Why do the protons stay
together in the nucleus rather than fly apart?
A
Electrons ía neighboring atoms neutralize
enprottms.
f
Neutrons cffectieIy block the protons and
kccp them far apart to prevent repulsion.
C
Electrostatic forces between neutrons and
protons hold the nucleus together.
Nuclear forces overcome repulsive forces
between protons rn the nucleus.
214
P0
84
>
+
214
o
214
85 Po
e
2
H
—
h
2
T
210
Po >82 F’b
+
4
‘Pb
+
e
0
H
2
o
2
P
A 24m4hkk piece of cardboard placed oer a
radiation source would he most effective iii
protecting against which type of radiation?
A
i1pha
II
gamma
fl
xray
4