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Use of the Data Booklet is relevant to this question - CIE - A-Level Chemistry - Question 12 - 2011 - Paper 1
Question 12
Use of the Data Booklet is relevant to this question. Which element is likely to have an electronegativity similar to that of aluminium? A barium B beryllium C mag... show full transcript
Worked Solution & Example Answer:Use of the Data Booklet is relevant to this question - CIE - A-Level Chemistry - Question 12 - 2011 - Paper 1
Step 1
Which element is likely to have an electronegativity similar to that of aluminium?
Answer
To determine which element has electronegativity similar to that of aluminium, we need to refer to the periodic table and consider trends in electronegativity.
Aluminium (Al) is located in group 13 of the periodic table. Beryllium (Be), magnesium (Mg), strontium (Sr), and barium (Ba) are located in groups 2 and 2—specifically, beryllium is in group 2, while magnesium, strontium, and barium are in groups 2 and 3, respectively.
Electronegativity generally increases across a period and decreases down a group. Since aluminium is in period 3, we would look for an element that is close in position on the periodic table. Beryllium is in period 2, while magnesium is directly below aluminium in group 3. Given these positions, the element with the most similar electronegativity to aluminium is likely to be magnesium (Mg). Therefore, the correct answer is: B. Beryllium.