EASY
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Mass of a neutron is the same as that of an electron.

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Important Questions on Structure of The Atom

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Science>Chemistry>Structure of The Atom>The Structure of an Atom
If electronic configuration of an atom is 2,8,7, then atomic number of the atom will be
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Science>Chemistry>Structure of The Atom>The Structure of an Atom

Match the following :
List -I :
(a) Frequency of distribution of the emitted radiation from a black body
(b) Spin quantum numbers(ms)
(c) Angular Momentum
(d) All orbital have equal energy

List - II :
(i) degeneracy
(ii) temperature dependent
(iii) vector quantity
(iv) mass times velocity times radius 

Codes:

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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Which will have electronic configuration 2,8,2 ?
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
The maximum number of electrons in a shell can be show by
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
In R22688 nucleus, there are
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Isotopes of an element contains 
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Which element have two shells and both these shells are fulfilled with electrons?
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Radioactive isotope used in the treatment of cancer disease is 
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Which of the following elements has two shells, both of which are completely filled with electrons? 
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
In the formation of which of the following compounds, the octet rule is not obeyed?
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Two elements P and Q have 5 and 7 electrons in their outermost shell respectively. The atomic number of P and Q will be
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
An atom has electronic configuration 2, 8. 7. What is the atomic number of this element.
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
The distribution of electrons in carbon is as follows:
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Science>Chemistry>Structure of The Atom>The Structure of an Atom

Two atoms are said to be isobars if 

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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Which one of the followings is correct electronic configuration of sodium?
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Which statement out of the following is true? Isobars have
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
How many valence electrons present in Cl- ion?
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Science>Chemistry>Structure of The Atom>The Structure of an Atom
Hydrogen contains three types of atoms (H11 protium, H12 deuterium, H13 tritium). These atoms are
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Science>Chemistry>Structure of The Atom>The Structure of an Atom

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15  of the Periodic Table. Write the electronic configuration of these two elements. Which one of these will be more electronegative? Why? 

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Science>Chemistry>Structure of The Atom>The Structure of an Atom
The number of neutrons in  Al1327 is