This question is about sodium oxide, Na2O
Sodium |
Oxygen |
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This question is about sodium oxide, Na2O
Sodium |
Oxygen |
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What is the formula of potassium sulfate?
(1)
☐ | A | K2(SO4)2 | |
☐ | B | K(SO4)2 | |
☐ | C | K2SO4 | |
☐ | D | KSO4 |
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The diagram shows the arrangement of electrons in an atom of calcium and in an atom of chlorine.
(3)
(4)
calcium ions: ......................................................................
chloride ions: ......................................................................
Number of spatulas of calcium chloride | Conductivity of solution in arbitrary units |
0 | 0 |
1 | 6 |
2 | 12 |
3 | 12 |
4 | 24 |
5 | 30 |
6 | 36 |
7 | 36 |
8 | 36 |
9 | 36 |
(3)
(1)
(1)
(2)
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The table below shows the properties of four substances, W, X, Y and Z.
Substance | Melting point | Boiling point | Conducts electricity when |
/ o C | / o C | solid | liquid | |
W | 3410 | 5930 | yes | yes |
X | 801 | 1413 | no | yes |
Y | 3550 | 4830 | no | no |
Z | -91 | 98 | no | no |
Use the information in the table to identify the substance that is an ionic compound.
(1)
☐ | A | substance W | |
☐ | B | substance X | |
☐ | C | substance Y | |
☐ | D | substance Z |
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The formation of ions and covalent bonds involves electrons.
The table gives the electronic configurations of atoms of hydrogen, lithium and chlorine.
Element | Electronic configuration of atom |
hydrogen | 1 |
lithium | 2.1 |
chlorine | 2.8.7 |
ions in lithium chloride
covalent bonds in hydrogen chloride
(3)
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Which of the following dot-and-cross diagrams shows the correct arrangement of electrons in lithium sulfide?
(1)
☐ | A | ||
☐ | B | ||
☐ | C | ||
☐ | D |
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This is a question about metals and their compounds.
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Which of the statements describes ionic bonding?
(1)
☐ | A | Electrostatic attraction between atoms | |
☐ | B | Electrostatic attraction between positively charged particles and delocalised electrons | |
☐ | C | Electrostatic attraction between oppositely charged ions | |
☐ | D | Electrostatic attraction between the nuclei of two atoms and a shared pair of electrons |
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The diagram shows the electronic configurations of an atom of lithium and an atom of oxygen.
Which statement is not correct about the changes in electronic configuration that occur when lithium and oxygen react to form lithium oxide, Li2O?
(1)
☐ | A | Two lithium atoms each lose one electron | |
☐ | B | One oxygen atom gains 2 electrons | |
☐ | C | A lithium ion has an electronic configuration of 2 | |
☐ | D | An oxide ion has an electronic configuration of 2.6 |
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This question is about ionic compounds.
Mg2+ | Al3+ | NH4+ | |
S2- | MgS | Al2S3 | |
NO3- | Al(NO3)3 | NH4NO3 | |
CO32- | MgCO3 | (NH4)2CO3 |
[3]
[1]
[2]
[3]
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