Chemistry-
General
Easy
Question
In modern periodic table the elements are arranged in the order of:
- Increasing mass
- Increasing volume
- Increasing atomic number
- Alphabetically
The correct answer is: Increasing atomic number
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Atomic weight as the fundamental property of atom was first recognised by:
Atomic weight as the fundamental property of atom was first recognised by:
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Which of the following is the contribution of John Dalton to the field of classification of elements ?
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In a multielectron atom which of the following orbitals described by three quantum numbers will have same energy in the absence of magnetic and electric fields ?
a) n=1 l=0, m=0
b) n=2, l=0 m=0
c) n=2 l=1 m=1
d) n=3 l=2 m=1
e) n=3 l=2 m=0
In a multielectron atom which of the following orbitals described by three quantum numbers will have same energy in the absence of magnetic and electric fields ?
a) n=1 l=0, m=0
b) n=2, l=0 m=0
c) n=2 l=1 m=1
d) n=3 l=2 m=1
e) n=3 l=2 m=0
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How many sets of four quantum numbers are possible for electrons present in He-2 anion?
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A transition metal ‘X’ has configuration [Ar] 3d4 in its+3 oxidation state.Its atomic number is....
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The velocities of two particles A and B are 0.05 and 0.02 m/s respectively. The mass of B is five times the mass of A. The ratio of their de Broglie wave lengths is.....
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If Pauli’s exclusion principle is not known the electronic arrangement of lithium atom would be:
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The following illustrates impossibility of measurement of position and velocity of an electron simultaneously.
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. Energy of an electron in an atom...
. Energy of an electron in an atom...
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