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1. option D titanium because metallic properties increases down the group .

2. option A potassium has the least malleable character due to top element of the group .

3. Option A transition elements are brightly colored .

4. Option D metallic trends are increase from right to left and top to bottom

5. Option A Conductivity will be the main concern for the mobility of free electrons during cooking

6.Option B Conductivity and ductility

7. Option B

Explanation:

b is the correct answer

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