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प्रश्न
Elements in the modern periodic table are arranged in ______groups and______ periods.
पर्याय
7, 18
18, 7
17, 8
8, 17
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उत्तर
Elements in the modern periodic table are arranged in 18 groups and 7 periods.
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संबंधित प्रश्न
State modern periodic law.
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Which of the following statements about the Modern periodic table is correct?
Find the odd one out and give its explanation.
______ forms the basis of the modern periodic table.
An element which is an essential constituent of all organic compounds belongs to
Group 16 elements are collectively called as ______.
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:
A and F
Name the non-metals in the first twenty elements.
