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प्रश्न
Give the chemical formula of sodium sulphite
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उत्तर
It denotes in a compound, the number of atoms of element present.
∴ Formula = \[\ce{Na2SO3}\]
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संबंधित प्रश्न
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
What are the merits of the modern periodic table of elements?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Name the type of elements which have outermost shell complete.
Name an alkali metal in period 3 and halogen in period 2.
State the number of elements in Period 3 of the Periodic Table.
The modern periodic table has 1 to 7 periods.
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
Give reason for the following:
Inert gases do not form ion.
