Question

i. Discuss and compare the trend in ionisation enthalpy of the elements of group 1 with those of
group 17 elements.
ii. Discuss the factors affecting electron gain enthalpy and the trend in its variation in the periodic
table
ii. What are major differences between metals and non-metals?
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Answer 1

Answer:

In each case a metal halide is formed

metals shiny

non metal non lustrous except iodine

electropositive metals

electronegative metals.