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Atomic Structure
Silicon-30 contains 14 protons. It also contains
16 electrons
16 neutrons.
30 neutrons
44 neutrons
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Atomic Structure
The geometry of NH3 on the basis of VSEPR model is
trigonal planar
trigonal pyramidal
tetrahedral
linear
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Atomic Structure
Atoms of the same element that have different masses are called
moles.
isotopes.
nuclides.
neutrons.
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Atomic Structure
Molecular orbital theory has
the superiority over the VB theory
the inferiority over the VB theory
neither superiority nor inferiority over VB theory
none of these
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Atomic Structure
Crystal formation is which type of reaction ?
endothermic and exothermic
endothermic
exothermic
no heat change occurs
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Atomic Structure
In a molecule number of electrons in BMO are more as compared to ABMO, hence
a bond will be formed
no bond will be formed
information is not sufficient
none of the above
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Atomic Structure
A weak attraction between a hydrogen atom in one molecule and an oxygen in another is called a(n)
Ionic bond.
Covalent bond
Metallic bond
Hydrogen bond
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Atomic Structure
The bond formed between the elements of low ionization energy and elements of high electron affinity is
ionic
covalent
metallic
coordinate
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Atomic Structure
NH3 molecule has
no lone pair
one lone pair
two lone pairs
three lone pairs
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Atomic Structure
The average atomic mass of an element is the average of the atomic masses of its
naturally occurring isotopes.
two most abundant isotopes.
nonradioactive isotopes.
artificial isotopes.
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