Chemical bonding
A.
Fill in the blanks
1.
The force which holds the two atoms together is called _____________
2.
Transfer of one or more electrons from one atom to other takes place to
form ______________or ___________bonds
3.
A _____________covalent compounds shows some ionic character
4.
_____________has four electrons In valence shell.
5.
Elements with completely filled outer shells are called __________
6.
__________compounds are
soluble in water
7.
Negatively charged particles formed by gain of electrons are called_______
8.
Number of electrons present in outermost shell are called __________
9.
The bond formed by a shared pair of electrons with both electrons
coming from the same atom.
10.
____________compounds are hard crystals yet brittle
Short Answer type question
1.
Difference between polar and non polar molecules
2.
Why do most of elements forms ions
3.
What is a lone pair? Give two examples
4.
In the formation of the compound XY2, an atom X gives one
electron to each Y atom. What is the nature of bond in XY2. Draw the
orbit structure of this compound.
5.
The electronic configuration of chloride ion and argon atom is same
then what is the difference between the two
6.
What type of bonds are usually formed between the metals and non metals
and why?
7.
Elements X,Y and Z have at no 6,9 and 12. Which one will
a. Form anion b) form a cation c) has four valence electrons
8.
Predict the type of bonding in
a. Oxygen b.
calcium oxide c. water
Answer the following
1. Give reason for the
following
a. A molecule of methane has
four single covalent bonds
b. Sodium chloride has high
melting and boiling point
c. Why atoms loose or gain
electrons
d. Non-polar are soluble in
organic solvents but insoluble in water.
2. Explain with the help of
electron dot structure
a. Formation of water
b. Formation of Ammonia
3. Distinguish between
Oxidation and Reduction
4. Five atoms are labeled from
A to E
Atoms Mass
No Atomic No
A 40 20
B 19 9
C 7 3
D 16 8
E 14 7
a) Which one of these atoms
i)contains 7 protons
ii) has an electronic
configuration of 2,7
b) Write down the formula of the
compound formed between C and D
c) Predic which are i) metals ii) non-metals
5. An atom X has electronic configuration of
2,8,18,8,1
a) predict the sign and charge on a
simple ion of X
b) write if X will be oxidizing agent
or reducing agent
6. What do you understand by redox reaction.
Give one example
7. Give structure of
a) hydronium ion b) Ammonium ion
8. Match the following
Column A Column
B
1) Sodium Chloride increases
2) Ammonium ion Covalent
bond
3) Electronegativity across
period Ionic bond
4) Carbon tetrachloride coordinate bond
5) Non metallic character down decreases
the group
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