The elements lithium, sodium and potassium are all in the same group of the periodic table - Edexcel - GCSE Chemistry - Question 3 - 2012 - Paper 1
Question 3
The elements lithium, sodium and potassium are all in the same group of the periodic table.
(a) Complete the sentence by putting a cross (X) in the box next to your... show full transcript
Worked Solution & Example Answer:The elements lithium, sodium and potassium are all in the same group of the periodic table - Edexcel - GCSE Chemistry - Question 3 - 2012 - Paper 1
Step 1
(a) Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The correct answer is B: group 1. Lithium, sodium, and potassium belong to the alkali metals, which are located in group 1 of the periodic table.
Step 2
(b) Give the symbol of an atom of another element that is in the same group of the periodic table as lithium, sodium and potassium.
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Answer
An acceptable answer would be Rb (Rubidium), Cs (Cesium), or Fr (Francium). These elements are also part of group 1.
Step 3
(c) The table shows the relative hardness and melting points of the three alkali metals, lithium, sodium and potassium, and the three transition metals, iron, copper and nickel.
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Answer
In the context of the table, one line should be drawn:
Alkali Metals: Indicate a line connecting lithium, sodium, and potassium to show they have soft and low melting points.
Transition Metals: Indicate a line connecting iron, copper, and nickel to show they have strong and high melting points.
