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Human Eye And Colourful World

Question
CBSEENSC10012055
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What is a covalent bond?

Solution

The covalent bond is said to be formed when two atoms achieve stability by sharing of an electron pair, each contributing one electron to the electron-pair. In this way, the atoms can be regarded as having acquired a noble gas configuration.

For example: H2, hydrogen is formed due to sharing of electron between two atom of hydrogen.

Some More Questions From Human Eye and Colourful World Chapter

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?

Why are some elements in molecular form while others are in atomic form?

Give the different forms of carbon with examples.

Define Allotropy. Name the allotropes of carbon which occur in nature.

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