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Question 1
a) | State the meaning of the term periodicity.
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b) | Identify the element in Period 3 with the highest electronegativity value.
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c) | Identify the element in Period 3 with the largest atomic radius. Explain your answer.
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Question 2
Melting points show a trend across a period. The melting points of some period 3 elements are shown in the table below. |
a) | Explain the trend shown in melting point, in terms of structure and bonding.
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Question 3
a) | Define the term first ionisation energy.
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b) | State and explain the trend in first ionisation energy of the elements in group 2.
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c) | The first ionisation energy of aluminium is lower than that of magnesium. Give the full electronic configurations of an atom of aluminium and an atom of magnesium.
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d) | Explain the difference in the first ionisation energies of the two metals.
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Question 4
Successive ionisation energies provide evidence for the existance of different electron shells in atoms. |
a) | Write an equation to represent the third ionisation energy of nitrogen
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b) | On the axes below, add crosses to estimate the successive ionisation energies of nitrogen.
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c) | Explain why the first ionisation energy of nitrogen is higher than the first ionisation energy of carbon.
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Question 5
This question is about the periodicity of the period 3 elements. |
a) | State and explain the general trend in first ionisation energy across period 3.
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b) | Give one example of an element which deviates from the general trend in first ionisation energy across Period 3. Explain why this deviation occurs.
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c) | Identify the element in period 3 that has the highest melting point. Explain your answer in terms of structure and bonding.
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d) | Identify the metallic element in period 3 that has the highest melting point. Explain your answer in tems of structure and bonding
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Question 6
The log of the third ionisation energy for six elements is shown in the table below. |
a) | Plot a graph of these data
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b) | Use the graph in part a) to estimate the third ionisation energy for argon, in kJ mol-1. Give your answer to the nearest whole number.
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c) | Suggest why the third ionisation energy of chlorine and argon are similar in magnitude.
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Question 7
The melting points of the period 3 elements are shown in the table below. |
a) | Explain the trend in melting points across the elements of period 3 in terms of their structure and bonding.
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Question 8
Elements and their compounds exhibit similarities and differences based on their respective positions within the periodic table. |
a) | Considering only the elements in periods 1-3, name the element with the largest atomic radius.
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b) | Considering only the elements in periods 1-3, name the element with the largest ionic radius.
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c) | Considering only the elements in periods 1-3, name the element with the highest first ionisation energy.
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d) | Considering only the elements in periods 1-3, name the element with the largest electronegativity.
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| 1 | 2 | 3 | 4 | 5 | 6 |
| 7 | 8 |