Chemistry-
General
Easy

Question

In modern periodic table the elements are arranged in the order of:

  1. Increasing mass    
  2. Increasing volume    
  3. Increasing atomic number    
  4. Alphabetically    

The correct answer is: Increasing atomic number

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Atomic weight as the fundamental property of atom was first recognised by:

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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
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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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The following illustrates impossibility of measurement of position and velocity of an electron simultaneously.

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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