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प्रश्न
Name the type of elements which have one electron short of octet.
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उत्तर
Halogens
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संबंधित प्रश्न
Give alongside is a part of the periodic table :
As we move horizontally from left to right:
| Li | Be | B | C | N | O | F | |
| Na | Mg | Al | Si | P | S | Cl |
(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?
What is the usual number of valence electrons in the atoms of the last element in a period?
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
On the basis of electronic configuration, how will you identify the first element of a period?
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
Name the scientist who stated the modern periodic law.
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
Which one of the following elements exhibit maximum number of valence electrons?
Which of the following elements would lose an electron easily?
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
