Advertisements
Advertisements
Question
The electronic configurations of two elements A and B are given below:
A | 2, 6 |
B | 2, 8, 1 |
(a) What type of chemical bond is formed between the two atoms of A?
(b) What type of chemical bond will be formed between the atoms of A and B?
Solution
(a) Two atoms of A can form covalent bond between them by sharing two electrons from each atom. This allows them to complete their octets and get stabilised. The molecule so formed is A=A.
(b) Atoms A and B may react to form ionic bond by transfer of two electrons from two atoms of B to form an ionic compound AB2.
APPEARS IN
RELATED QUESTIONS
Why covalent compounds are different from ionic compounds?
Name the following:
The property of element by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure.
What type of bonds are present in water molecule? Draw the electron-dot structure of water (H2O).
Using electron-dot diagrams which show only the outermost shell electrons, show how a molecule of nitrogen, N2, is formed from two nitrogen atoms. What name is given to this type of bonding? (Atomic number of nitrogen is 7)
An element A has 4 valence electrons in its atom whereas element B has only one valence electron in its atom. The compound formed by A and B does not conduct electricity. What is the nature of chemical bond in the compound formed? Give its electron-dot structure.
For each compound mentioned above give the formulae of ions formed in aqueous solution.
Draw all possible structural formulae of compound from their molecular formula given below.
C3H8
Give examples for the following:
Two gaseous polar compounds.
Give examples for the following:
Two gaseous non polar compounds.
Name a neutral covalent molecule which contains one lone pair of electrons.
In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?
Draw the electron dot structure of covalent compound methane (non polar) and HCL (polar) and give two difference between them.
Explain the following:
Polar covalent compounds conduct electricity?
Write an Explanation.
Alkyne
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
\[\begin{array}{cc}\phantom{......}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\ \phantom{.....}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C = C}\\\phantom{.....}|\phantom{.........}|\\ \phantom{.....}\ce{H}\phantom{........}\ce{H}\end{array}\] |
Which of the following statements are usually correct for carbon compounds? These
- are good conductors of electricity
- are poor conductors of electricity
- have strong forces of attraction between their molecules
- do not have strong forces of attraction between their molecules.
A molecule of ammonia (NH3) has
In covalent bond formation, the sharing of ______ electrons takes place in their outermost shell.
Assertion (A): Melting point and boiling point of ethanol are lower than that of sodium chloride.
Reason (R): The forces of attraction between the molecules of ionic compounds are very strong.