a) Elements A, B, C and D have atomic numbers 8, 9, 11 and 12 respectively.
1. Choose the electropositive and electronegative elements from the above
elements.
2. State the position of element A and C in the periodic table.
b) Write equations for the following conversions:
1. Steam to hydrogen
2. Aluminium to sodium meta aluminate
c) Calculate the percentage composition of in calcium nitrate,
(At wt. Ca=40, N=14, 0=16)
d) State Newland's law of octaves. Give its two drawbacks.
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Answer:
a) A and B are electronegative elements, C,D electropositive elements.
2.A is in group 16, C is in group 1
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