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Standard X
Chemistry
Cationic Radius
13. Increase ...
Question
13. Increase in atomic size down the group is due to(1) In crease in number of orbit(2) Increase in number of protons and neutrons(3) Increase in number of protons(4) Increase in number of protons, neutrons andelectrons
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Q.
Increase in atomic number by one unit due to emission of
β
- particle is as a result of conversion of neutron into proton.
Q.
When we will go down in a group in periodic table than electrons and number of shells will increase. and number of protons will also increase then nuclear charge of particular atom of element will increase or not?
Q.
Assertion :The plot of atomic number (
y
-axis) versus number of neutrons (
x
-axis) for stable nuclei shows a curvature towards
x
-axis from the line of
45
o
slope as atomic number is increased. Reason: Proton-proton electrostatic repulsion begin to overcome attractive forces involving protons and neutrons in heavier nuclides.
Q.
In an atom the sum of neutrons and protons is
14
. The number of neutrons is two more than number of protons. The atom is :
Q.
How many electrons, protons and neutrons are there in a nucleus of atomic number
11
and mass number
24
?
(i) number of electron
=
________.
(ii) number of protons
=
________.
(iii) number of neutrons
=
_______.
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