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Please answer in your own words; do not copy from the course material.
There are unequal number of elements in the periods in the Periodic Table,
What is understood by hydrogen bonding? How does hydrogen bonding? How does
hydrogen bonding affect the properties of compounds? How many types of hydrogen
bonding are there?
What are alkali metals? Why do these metals not occur in free state in nature? List
the principal ores of alkali metals.
(a) Why is beryllium hydride polymeric in nature? Discuss the structure of polymeric
What is meant by effective nuclear charge? What are the factors that determine the
effective nuclear charge? How is it calculated?
At normal temperature, the trihalides of boron are all monomeric compounds whereas
those of aluminium, except AlF3, are dimeric solids, explain.
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