This question is about elements in group 1 of the periodic table - Edexcel - GCSE Chemistry - Question 2 - 2022 - Paper 1
Question 2
This question is about elements in group 1 of the periodic table.
(a) Figure 3 shows the symbols of the first three elements in group 1 of the periodic table and th... show full transcript
Worked Solution & Example Answer:This question is about elements in group 1 of the periodic table - Edexcel - GCSE Chemistry - Question 2 - 2022 - Paper 1
Step 1
Give the symbol of another element in group 1.
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Answer
One other element in group 1 is Rubidium (Rb).
Step 2
Give the atomic number of lithium.
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Answer
The atomic number of lithium is 3.
Step 3
Describe the trend in the melting points of the elements in Figure 3.
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Answer
The melting points of the elements in group 1 decrease as you go down the group. Specifically, lithium has the highest melting point at 181 °C, followed by sodium with a melting point of 98 °C, and potassium with the lowest at 64 °C. This trend indicates that as the atomic number increases, the melting point decreases.
Step 4
Give the name of the container shown in Figure 4.
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Answer
The container shown in Figure 4 is a test tube.
Step 5
step 2: change and explanation
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Change: Cut a smaller piece of sodium.
Explanation: By cutting a smaller piece of sodium, the reaction will be less vigorous, allowing for a safer experiment.
Step 6
step 3: change and explanation
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Answer
Change: Use a larger container for water.
Explanation: A larger container will contain the reaction better and reduce the risk of splashing and the potential hazards associated with vigorous reactions.
