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प्रश्न
An element A has 2 electrons in its fourth shell. State its electronic configuration.
उत्तर
Its electronic configuration is 1s22s22p63s23p64s2.
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संबंधित प्रश्न
Explain why, the noble gases are placed in a separate group.
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
Arrange the elements of second and third periods in increasing order of their atomic size.
Third Period.
How does the electronic configuration of an atom relate to its position in the modern periodic table?
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
The K and L shells of the elements Na and Mg contain electrons.
Noble gases belong to______ group of the periodic table.
______ group elements are called alkaline earth metals.
