Download Test-SL HLAtomicTheory-20a

Name:
THE INTERNATIONAL SCHOOL OF AZERBAIJAN
Topic Test:
Atomic Theory SL & HL
Standard & Higher Level
Time allowed: One lesson
MC Score:
/
EA Score:
/
Total:
/
Percent:
All questions are from IB past papers
%
Grade
≥ 80.0
7
79.9 - 68.0
6
67.9 – 58.0
5
45.0 – 57.9
4
30.0 – 44.9
3
20.0 – 29.9
2
< 20.0
1
1.
[1 mark]
Bromine consists of two stable isotopes that exist in approximately a 1 : 1 ratio. The relative atomic
mass, A, of bromine is 79.90. Which are the stable isotopes of bromine?
2.
A.
79Br
and 81Br
B.
80Br
and 81Br
C.
78Br
and 80Br
D.
79Br
and 80Br
[1 mark]
Which is correct for
3.
?
[1 mark]
Which representation would be correct for a species, Z, which has 31 protons, 40 neutrons and 28
electrons?
A.
B.
C.
D.
4.
[1 mark]
Which ion will show the least deflection in a mass spectrometer?
A.
B.
C.
D.
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5.
[1 mark]
Which statements about the isotopes of chlorine,
I
They have the same chemical properties.
II
They have the same atomic number.
III
They have the same physical properties.
6.
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
and
, are correct?
[1 mark]
Which quantities are the same for all atoms of chlorine?
I
Number of protons
II
Number of neutrons
III
Number of electrons
7.
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
[1 mark]
What is the ground state electron configuration of an atom of chromium, Cr (Z = 24)?
8.
A.
[Ar]3d6
B.
[Ar]4s23d4
C.
[Ar]4s13d5
D.
[Ar]4s24p4
[1 mark]
Which transition in the hydrogen atom emits visible light?
A.
n = 1 to n = 2
B.
n = 2 to n = 3
C.
n = 2 to n = 1
D.
n = 3 to n = 2
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9.
[1 mark]
Which statements are correct for the emission spectrum of hydrogen?
I
The lines converge at higher frequencies.
II
Electron transitions to n = 2 are responsible for lines in the visible region.
III
Lines are produced when electrons move from lower to higher energy levels.
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III
10. [1 mark]
Which electron transition emits radiation of the longest wavelength?
MULTIPLE CHOICE QUESTIONS are now HIGHER LEVEL
STANDARD LEVEL QUESTIONS CONTINUE AFTER THESE M/C
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11. [1 mark]
Which element is represented by the first eight successive ionization energies on the graph?
A.
Mg
B.
S
C.
Cl
D.
Ar
12. [1 mark]
The values for the first three successive ionization energies for two elements X and Z are given.
Which pair of elements represents X and Z?
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13. [1 mark]
The graph shows the first ionization energies of some consecutive elements.
Which statement is correct?
A.
Y is in group 3
B.
Y is in group 10
C.
X is in group 5
D.
X is in group 18
14. [1 mark]
A period 3 element, M, forms an oxide of the type M2O. Which represents the first four successive
ionization energies of M?
15. [1 mark]
Between which ionization energies of boron will there be the greatest difference?
A.
Between 1st and 2nd ionization energies
B.
Between 2nd and 3rd ionization energies
C.
Between 3rd and 4th ionization energies
D.
Between 4th and 5th ionization energies
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STANDARD LEVEL QUESTIONS RESUME
16.
a.
[1 mark]
This question is about iron.
Deduce the full electron configuration of Fe2+.
b.
[1 mark]
State the nuclear symbol notation,
c.
, for iron-54.
[2 marks]
Mass spectrometry analysis of a sample of iron gave the following results:
Calculate the relative atomic mass, Ar, of this sample of iron to two decimal places.
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17.
a.
[2 marks]
State the relative mass and charge of the subatomic particles of an atom.
b.
i.
[3 marks]
Calculate the number of neutrons and electrons in one atom of
.
Neutrons:
Electrons:
ii.
State one difference in the physical properties of the isotopes
their chemical properties are the same.
Physical:
Chemical:
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and
and explain why
c.
[1 mark]
Copper is a metal that has been used by humans for thousands of years.
State the full electron configuration of
.
18. [6 marks]
Every element has its own unique line emission spectrum.
(i)
Distinguish between a continuous spectrum and a line spectrum.
(ii) Draw a diagram to show the electron transitions between energy levels in a hydrogen atom that
are responsible for the two series of lines in the ultraviolet and visible regions of the spectrum. Label
your diagram to show three transitions for each series.
19.
a.
[1 mark]
Explain why the relative atomic mass of argon is greater than the relative atomic mass of potassium,
even though the atomic number of potassium is greater than the atomic number of argon.
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b.
[1 mark]
Deduce the electron configuration for the ion
END OF STANDARD LEVEL
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.
HIGHER LEVEL
20. [1 mark]
Sketch the orbital diagram of the valence shell of a bromine atom (ground state) on the energy axis
provided. Use boxes to represent orbitals and arrows to represent electrons.
21.
a.
[1 mark]
The emission spectrum of an element can be used to identify it.
Hydrogen spectral data give the frequency of 3.28 × 1015 s–1 for its convergence limit.
Calculate the ionization energy, in J, for a single atom of hydrogen using sections 1 and 2 of the data
booklet.
b.
[1 mark]
Calculate the wavelength, in m, for the electron transition corresponding to the frequency in (a)(iii)
using section 1 of the data booklet.
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22.
a.
[1 mark]
Draw the first four energy levels of a hydrogen atom on the axis, labelling n = 1, 2, 3 and 4.
b.
[1 mark]
Draw the lines, on your diagram, that represent the electron transitions to n = 2 in the emission
spectrum.
End of Paper
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