Syllabus Edition
First teaching 2014
Last exams 2024
The reaction shown occurs in gas clouds throughout the Universe.
H2(g) + H2+(g) → H(g) + H3+(g)
Which is the correct atomic structure of the H3+ ion?
|
protons |
neutrons |
electrons |
|
|
A B C D |
3 3 2 2 |
0 0 1 1 |
1 2 1 2 |
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Which row is correct regarding atomic structure?
|
The atomic number is the number of |
The proton number is the number of |
The mass number is the number of |
|
|
A B C |
atoms electrons electrons protons |
protons neutrons neutrons protons |
protons nucleons protons nucleons |
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The phosphide ion, format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%226.5%22%20y%3D%2227%22%3E15%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%226.5%22%20y%3D%2212%22%3E32%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2222.5%22%20y%3D%2219%22%3EP%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2231.5%22%20y%3D%2212%22%3E3%3C%2Ftext%3E%3Ctext%20font-family%3D%22math1da40657c9fece7e48d30af42d3%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2240.5%22%20y%3D%2212%22%3E%26%23x2212%3B%3C%2Ftext%3E%3C%2Fsvg%3E)
, is used in medicine as a radiotherapy treatment for some forms of cancer.
What is the composition of the phosphide ion?
|
protons |
neutrons |
electrons |
|
|
A B C D |
15 15 17 17 |
17 17 15 15 |
32 18 15 32 |
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Which option correctly describes the relative charges and masses of the subatomic particles?
|
proton |
neutron |
electron |
the relative mass of an electron |
|
|
A
|
+1
|
0
|
-1
|
1
|
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Which row correctly describes the characteristics of the nucleus and surrounding space?
|
nucleus |
surrounding space |
|
|
A B C D |
small, dense and neutral large, dense and positive large, dense and neutral small, dense and positive |
mainly empty space densely populated with electrons densely populated with electrons mainly empty space |
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A periodic table is need for this question
X is a particle with 19 electrons and 20 neutrons.
Three species are shown below:
|
1 |
40Ca+ |
|
2 |
39K+ |
|
3 |
38Ar |
Which of the three species could particle X be?
1 only
1 and 2
2 and 3
1, 2 and 3
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The elements of the periodic table have different isotopes.
What is different about the nuclei of stable isotopes?
the same number of protons, but different number of neutrons
the same number of protons, and the same number of neutrons
a different number of protons, and a different number of neutrons
a different number of protons, and the same number of neutrons
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Iron has many different naturally occurring isotopes.
|
Isotope |
% Abundance |
Isotopic mass |
|
54Fe |
5.845 |
53.9396 |
|
56Fe |
91.754 |
55.9349 |
|
57Fe |
2.119 |
56.9354 |
|
58Fe |
0.282 |
57.9333 |
Using the information given, what is the average atomic mass of iron?
56.1858 amu
54.200 amu
59.270 amu
55.845 amu
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Using the Aufbau Principle and Hund’s rule, deduce which element below has the greatest number of unpaired electrons in its ground state.
Z = 13
Z = 14
Z = 15
Z = 16
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Which electron transition would emit radiation of the longest wavelength?
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A periodic table is needed for this question
In which of the following species are the numbers of protons, neutrons and electrons all different?
23Na+
27Al
19F-
32S2-
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The atomic number of an element gives the number of protons in the nucleus which is also equal to the number of electrons. Which statement explains why atoms are neutral?
one proton has a mass 1840 times greater than one electron
the charge on an electron is equal and opposite to the charge on a proton
the difference in charge between electrons and protons is balanced by the neutrons
electrons are spread out in shells around the nucleus while protons are concentrated inside the nucleus
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Which statements correctly describe the distribution of mass and charge in the atom?
|
1 |
the negative charge is concentrated in one area outside the nucleus |
|
2 |
the mass is concentrated inside the nucleus |
|
3 |
the negative charge is spread around outside the nucleus |
1 and 3
1 and 2
2 and 3
1, 2 and 3
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A periodic table is needed for this question
There are six unpaired electrons in atoms of element Z. What could element Z be?
sulfur
iron
carbon
chromium
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The diagram shows three orbitals labelled 1, 2 and 3.
What is the correct label for each orbital?
px, py and pz
s, pz and py
s, px and pz
s, px and py
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A periodic table is needed for this question
What is the electronic configuration of an ion with a single negative charge and atomic number 17?
1s2 2s2 2p6 3s1 3p6
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s1 3p5
1s2 2s2 2p6 3s2 3p5
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A periodic table is needed for this question
What is the correct sequence for the orbitals shown in an atom of vanadium in order of decreasing energy?
3s 3p 4s 3d
4s 3d 3s 3p
4s 3d 3p 3s
3d 4s 3p 3s
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The isotope 
is used in the treatment of cancer cells in the body.
Which statements about this isotope are correct?
|
1 |
the charge on the nucleus is +27 |
|
2 |
there are 33 neutrons in the nucleus |
|
3 |
it has the same number of neutrons as other isotopes of cobalt |
1 and 2
1 and 3
2 only
1, 2 and 3
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The mass spectrum of element X is shown below.
Which of the following statements is correct?
X has a relative atomic mass between 70 and 71
The three isotopes of X are separated after being converted to anions
The most abundant isotope of X contains 71 neutrons
The isotope of X with mass 72 will be deflected the most
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A periodic table is needed for this question
Which row correctly describes the subatomic particles found in 26Mg2+?
|
protons |
neutrons |
electrons |
|
|
A |
10 |
14 |
12 |
|
B |
12 |
14 |
10 |
|
C |
12 |
26 |
10 |
|
D |
14 |
12 |
12 |
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Element X is in period 2 and has the first seven ionisation energies in kJ mol-1 as shown.
|
1300 |
3380 |
5330 |
7460 |
11 010 |
13 320 |
71 200 |
What is the electronic configuration of element X?
1s2 2s2 2p4
1s2 2s2 2p2
1s2 2s2 2p3
1s2 2s2 2p6
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For the successive ionisation energies of oxygen, where would the highest jump be expected to occur?
second ionisation energy
first ionisation energy
seventh ionisation energy
sixth ionisation energy
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Which statement explains the similarity in chemical behaviour for isotopes of the same element?
they may have the same electronic configuration, depending on the reaction
they have the same electronic configuration
their mass numbers are different
they have different numbers of neutrons
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Which species produces a half-filled set of p orbitals on losing an electron?
Li+
F
N
N-
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Which statement explains why electrons pair up in orbitals before occupying an orbital of a higher energy level?
the energy from repulsion is greater than the jump to a higher orbital
electrons occupy higher energy orbitals before lower energy orbitals
electrons in lower orbitals have higher energies
the energy from repulsion is less than the jump to a higher orbital
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An element consists of two isotopes 69X and 71X, whose abundances are 60% and 40% respectively. What is the relative atomic mass of element X?
69.2
69.8
70.0
70.2
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Which equation is correct for the third ionization energy for the element nitrogen?
N+(g) → N4+(g) + 3e-
N2+(g) → N3+(g) + e-
N(g) → N3+(g) + 3e-
N3+(g) → N4+(g) + e-
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A line emission spectrum occurs when
electrons release energy as they move from high to low energy levels
electrons release energy as they move from low to high energy levels
electrons absorb energy as they move from high to low energy levels
electrons absorb energy as they move from low to high energy levels
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A spectral line that would be found in the visible spectrum of the hydrogen emission spectrum would be
n1 → n2
n2 → n3
n3 → n2
n3 → n∞
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