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प्रश्न
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
विकल्प
Cl > Si > Al > Mg > Na
Na > Mg > Al > Si > Cl
Na > Al > Mg > Cl > Si
Al > Na > Si > Ca > Mg
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उत्तर
Na > Mg > Al > Si > Cl
Explanation:
Metallic character refers to the tendency of an element to lose electrons. In the periodic table:
- Across a period (from left to right), metallic character decreases because the atomic size decreases and the effective nuclear charge increases, making it harder to lose electrons.
- All the given elements (Na, Mg, Al, Si, Cl) belong to Period 3.
- Arranging them from left to right in Period 3 gives the order of decreasing metallic character: Sodium (Na) > Magnesium (Mg) > Aluminium (Al) > Silicon (Si) > Chlorine (Cl).
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संबंधित प्रश्न
Arrange the following as per the instruction given in the bracket.
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(i) across the period left to right
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Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
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Give examples in support of your answer.
Nature of oxides of the elements ?
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iii) Observe the figure and answer the following questions.
a) Identify the block shown by box A and write an electronic configuration of any one element of this block.
b) Identify the block of element denoted by letter B and write its period number.
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive metal
For the main group of the periodic table, the metallic properties of the elements vary approximately with their position as shown in the table.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| H | He | ||||||
| A | B | ||||||
| C | D |
Will the most non-metallic element be found at A,B,C or D ?
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Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The element at the bottom of a group would be expected to show ______ metallic character than the element at the top.
Refering to changes in the properties of elements on moving from left to right across a period of the periodic table. Choose the correct answer.
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Electropositivity means ______.
Electronegativity is the metallic property of an element.
Write an explanation.
Electronegativity
Write scientific reason.
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Arrange:
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