Study the data given in the following table and answer the questions that follow. The letters are not the actual symbols of elements.

Study the data given in the following table and answer the questions that follow. The letters are not the actual symbols of elements.

(i) State and explain the trend in melting point in A B C
(ii) Explain why the melting point and boiling points of element D is the highest
(iii) Explain why the element represented by letter E has two melting point values
(iv) Write down the chemical formula between element C and sulphate ions
(v) Name the chemical family in which H belong and state one use of the element
(vi) What is the nature of the oxide of the elements represented by letters C and F?

Answers

i) The melting point increases from A to C this is due to increase in number delocalized electron
hence increase in the strength of metallic bond.

ii) D forms a giant structure with strong covalent bonds. Hence high melting.

iii) It exhibits allstrophy that is,may exist as two different form in the same state.

iv) C₂ (so₄)₃

v) Noble gases or inert

-Used in filament bulbs
-Used to produce an inert atmosphere in high temperature processes for example, welding.

vi)-C is amphoteric oxide
-F acidic it is non –metal oxide.

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maurice.mutuku answered the question on October 22, 2019 at 06:43

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