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प्रश्न
The modern periodic table was prepared by ______.
विकल्प
Dobereiner
Newlands
Bohr
Mendeleev
उत्तर
The modern periodic table was prepared by Mendeleev.
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संबंधित प्रश्न
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)
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
Name two elements in each case: Lanthanides
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
Give the symbol and valency of the following element and radical.
Zinc
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?
Group 16 elements are collectively called as ______.
An element with atomic number ______ will form a basic oxide.
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
