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प्रश्न
Which element has two shells, both of which are completely filled with electrons?
उत्तर
Neon with atomic number 10.
Electronic configuration:- Shells: K L
Electrons arranged: 2 8
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संबंधित प्रश्न
Give two example of group 17 elements.
State how the valency of elements varies in a period of the periodic table?
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)
Give the group number of following elements present in periodic table
Name two elements in halogens.
State the number of elements in Period 2 of the Periodic Table.
Distinguish between:
Group 17 - Group 18
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
Define groups of modern periodic table.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
