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Human Eye And Colourful World

Question

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Why does Li tend to form ionic compounds while boron form covalent compounds?

Solution

Li has a very small ionization energy and so readily forms Li⁺. Boron has to lose three electrons to form B³⁺ and so it does not readily form ionic compounds, preferably forms covalent compounds.

Some More Questions From Human Eye and Colourful World Chapter

Taking a simple example, explain how the formation of covalent bond between two atoms brings stability to the molecule formation.

Explain the formation of covalent bonds in (i) chlorine molecule; (ii) carbon tetrachloride and (iii) ammonia.

What is meant by double bond or double covalent bond? Give some examples.

What is triple bond or triple covalent bond? Explain the formation of triple bond giving two examples.

What are covalent compounds?

Which of the following combination is most likely to form covalent bond/s? Explain.
(i) Sodium and hydrogen (ii) Magnesium and oxygen
(iii) Chlorine and oxygen (iv) Calcium and bromine.

Why does Li tend to form ionic compounds while boron form covalent compounds?

What are the physical properties of carbon compounds or covalent compounds?

Explain why covalent compounds are generally low melting?

Covalent compounds are bad conductors of electricity. Why?

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