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प्रश्न
Noble gases belong to______ group of the periodic table.
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उत्तर
Noble gases belong to 18th group of the periodic table.
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संबंधित प्रश्न
Name the scientist who prepared modern 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)
How many periods and groups are there in the modern periodic table?
Give the symbol and valency of the following element and radical.
Carbonate
Give the symbol and valency of the following element and radical.
Sulphate
Find the correlation:
Group 1 and 2 : s block : : group 13 and 18 : ______
Write an explanation.
Period
The arrangement of elements in the Modern Periodic Table is based on their ______.
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
E and B
