Chemistry class ix notes 9th class board pattern model paper
Chp-3, Periodic table and periodicity of
properties Important questions, if you attempt these question you will get InshaAllah 100% marks.
Chp-3, Periodic table and periodicity of
properties
Objective
Part
Choose the right option. 10×1=10
A
|
B
|
C
|
D
|
||
1
|
Transition elements are:
|
All gases
|
All metals
|
All non-metals
|
All metalloids
|
2
|
Mendeleev periodic table was
based upon the:
|
Electronic
configuration
|
Atomic mass
|
Atomic number
|
Completion of subshells
|
3
|
Unit of ionization energy are:
|
KJ/mol
|
KJmol
|
KJ
|
J/mol
|
4
|
The d-block elements lie between
the______ blocks.
|
s-p
|
d-f
|
p-s
|
f-d
|
5
|
Sixth and seventh periods are called:
|
Short period
|
Normal period
|
Long period
|
Very long period
|
6
|
Along the period, which one of
the following decreases
|
Atomic radius
|
Ionization energy
|
Electron affinity
|
Electro negativity
|
7
|
The half of the distance between
the nuclei of two bonded atom is referred as:
|
Atomic size
|
Atomic radii
|
Ionic radii
|
Common size
|
8
|
Which scientist had given the
idea of octaves in periodic table?
|
Mendeleev
|
Al-Razi
|
Newland
|
Dobereiner
|
9
|
In __________ H. Moseley
discovered a new property of the elements i.e. atomic number
|
1913
|
1914
|
1915
|
1916
|
10
|
The amount energy given out when an electron is
added to an atom is called :
|
Lattice energy
|
Ionization energy
|
Electro negativity
|
Electron affinity
|
Subjective
Answer the short
questions.
10×2=20
1. What
do you mean by groups and periods in a periodic table?
2. Give
the trend of ionization energy in a periodic table?
3. Why
noble gases are not reactive?
4. State
Mendeleev’s periodic law.
5. From
which element lanthanide series starts?
6. Define
ionization energy.
7. How
can you define atomic radius?
8. Why
the trend of electron affinity and electronegativity is same in a period?
9. What
is shielding effect?
10. What
is the reason of arranging elements in a group?
Long
Questions 5×1=5
1. (a)
Write down the salient features of long form of periodic table. 3
(b) Describe the trends of electronegativity in a
period and in a group. 2
Available all
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