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9th CBSE
IMPORTANT
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The isotope deuterium of hydrogen has

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Important Questions on Structure of the Atom

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9th CBSE
IMPORTANT
The electron present in the outermost shell are called
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9th CBSE
IMPORTANT
The α- particle contains
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9th CBSE
IMPORTANT
The atomic number of sodium is 11 and its mass number is 23. It has
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9th CBSE
IMPORTANT
The electronic configuration of chlorine is 
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9th CBSE
IMPORTANT
The isotope used to remove the brain tumours and treatment 
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9th CBSE
IMPORTANT
The isobars among the following is 
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9th CBSE
IMPORTANT
The elements with same valence electrons and form same type of ions
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9th CBSE
IMPORTANT
In the - scattering experiment, few - particles rebounded because