11 mark
Which equation represents the second ionisation energy of chlorine?
Cl− (g) + e−→ Cl2− (g)
Cl (g) + 2e− → Cl2− (g)
2Cl (g) → 2Cl+ (g) + 2e−
Cl+ (g) → Cl2+ (g) + e−
Was this exam question helpful?
Electrons & Ions (Edexcel International AS Chemistry): Multiple Choice Questions
Exam code: XCH11
32 mins19 questions
21 mark
Which equation represents the second ionisation energy of magnesium?
Mg (g) → Mg2+ (g) + 2e−
Mg+ (g) → Mg2+ (g) + e−
Mg (s) → Mg2+ (s) + 2e−
Mg+ (s) → Mg2+ (s) + e−
Was this exam question helpful?
31 mark
Several factors may affect ionisation energies:
I) the number of protons increases
II) the outer electron is further from the nucleus
III) the amount of shielding increases
IV) the number of unpaired outer electrons increases
Which factors explain the decrease in ionisation energy as Group 1 is descended?
I and II
II and III
III and IV
I, II, III and IV
Was this exam question helpful?
41 mark
Why is the second ionisation energy of magnesium greater than its first ionisation energy?
The Mg+ ion is larger than the Mg atom
The second electron is removed from a positive ion
The second electron is removed from an inner shell
The nuclear charge of Mg+ is greater than that of Mg
Was this exam question helpful?
51 mark
In which block of the Periodic Table is zirconium, Zr, found?
d block
f block
p block
s block
Was this exam question helpful?
11 mark
The graph shows log (ionisation energy) against ionisation number for the successive ionisations of an element.
In this element, how many quantum shells contain electrons, and how many electrons are in the outer quantum shell?
|
| Number of quantum shells containing electrons | Number of electrons in the outer quantum shell |
☐ | A | 3 | 2 |
☐ | B | 3 | 5 |
☐ | C | 5 | 2 |
☐ | D | 5 | 5 |
Was this exam question helpful?
21 mark
A stable ion, M3+, contains 18 electrons.
In which block of the Periodic Table is element M found?
s
p
d
f
Was this exam question helpful?
31 mark
Which ion has the electronic configuration 1s22s22p63s23p6 in its ground state?
Al3+
Cl−
N3−
Na+
Was this exam question helpful?
41 mark
A p-block element in Period 3 of the Periodic Table reacts to form an ionic compound.
What could be the electronic configuration of the ion formed by this element?
1s22s22p63s2
1s22s22p63s23p6
1s22s22p63s23p63d10
1s22s22p63s23p63d104s24p6
Was this exam question helpful?
51 mark
Which Period 3 element has the highest second ionisation energy?
sodium
magnesium
chlorine
argon
Was this exam question helpful?
61 mark
Which of these elements has atoms with only one unpaired electron?
boron
carbon
nitrogen
oxygen
Was this exam question helpful?
71 mark
Element X is in Period 2. Its first seven ionisation energies are shown.
Ionisation | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th |
|---|---|---|---|---|---|---|---|
Ionisation energy / kJ mol−1 | 1314 | 3388 | 5301 | 7469 | 10 989 | 13 327 | 71 330 |
What is the electronic configuration of X?
1s2 2s2 2p2
1s2 2s2 2p3
1s2 2s2 2p4
1s2 2s2 2p5
Was this exam question helpful?
81 mark
The first five ionisation energies of four elements in Period 3 are shown.
Ionisation energy / kJ mol−1 | |||||
|---|---|---|---|---|---|
Element | 1st | 2nd | 3rd | 4th | 5th |
A | 1251 | 2298 | 3822 | 5159 | 6542 |
B | 738 | 1451 | 7733 | 10 543 | 13 630 |
C | 496 | 4562 | 6910 | 9543 | 13 354 |
D | 787 | 1577 | 3232 | 4356 | 16 091 |
Which element could be magnesium?
Was this exam question helpful?
11 mark
Element Q reacts with sulfur to form an ionic compound.
The first five ionisation energies of Q are shown.
Ionisation | 1st | 2nd | 3rd | 4th | 5th |
|---|---|---|---|---|---|
Ionisation energy / kJ mol−1 | 550 | 1064 | 4138 | 5500 | 6910 |
What is the formula of the compound formed between Q and sulfur?
QS
Q2S
QS2
Q2S3
Was this exam question helpful?
21 mark
The first eight ionisation energies of two elements, X and Y, are shown.
Ionisation energy / kJ mol−1 | ||||||||
|---|---|---|---|---|---|---|---|---|
Element | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th |
X | 590 | 1145 | 4912 | 6491 | 8153 | 10 496 | 12 270 | 14 206 |
Y | 1012 | 1907 | 2914 | 4964 | 6274 | 21 267 | 25 431 | 29 872 |
X and Y both form ions with the same electronic configuration as argon.
What are X and Y?
calcium and phosphorus
calcium and sulfur
potassium and chlorine
potassium and phosphorus
Was this exam question helpful?
31 mark
Element E is in Period 2. Its first six ionisation energies are shown.
Ionisation | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|
Ionisation energy / kJ mol−1 | 1402 | 2856 | 4578 | 7475 | 9445 | 53 267 |
The increase from the third to the fourth ionisation energy is larger than the increase from the second to the third.
Which statement explains this?
The fourth electron is removed from the 1s sub-shell
The fourth electron is removed from the 2s sub-shell
The fourth electron is removed from the 2p sub-shell
The fourth electron is removed from a shell closer to the nucleus
Was this exam question helpful?
41 mark
Which of these gaseous ions has exactly three unpaired electrons in its ground state?
Cr3+
Cu2+
Fe2+
Mn2+
Was this exam question helpful?
51 mark
How many orbitals contain at least one electron in a ground-state iron atom?
7
13
14
15
Was this exam question helpful?