IB Bonding Q

IB Bonding Q - 1. What is the formula for the compound...

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Unformatted text preview: 1. What is the formula for the compound formed by calcium and nitrogen? A. CaN B. Ca 2 N C. Ca 2 N 3 D. Ca 3 N 2 (1) 2. The boiling points of the hydrides of the group 6 elements are shown below. 400 300 200 100 Boiling point / K H O H S H Se H Te 2 2 2 2 (i) Explain the trend in boiling points from to H 2 S to H 2 Te. . . . . (2) 1 (ii) Explain why the boiling point of water is higher than would be expected from the group trend. . . . . (2) (Total 4 marks) 3. (i) State the shape of the electron distribution around the oxygen atom in the water molecule and state the shape of the molecule. . . (2) (ii) State and explain the value of the HOH bond angle. .. .. .. .. (2) (Total 4 marks) 4. Explain why the bonds in silicon tetrachloride, SiCl 4 , are polar, but the molecule is not. (Total 2 marks) 2 5. The diagrams below represent the structures of iodine, sodium and sodium iodide....
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IB Bonding Q - 1. What is the formula for the compound...

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