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प्रश्न
Write a scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
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उत्तर
- An atom's metallic nature is characterised by its propensity for losing electrons.
- Electrons are added to the same outermost shell as they move from left to right over time. At the same time, protons are added to the nucleus, increasing its charge.
- As a result of the higher effective nuclear charge, these electrons are attracted to the nucleus more strongly.
- As a result, it is more difficult to remove a valence electron from an atom.
Hence, metallic character goes on decreasing while going from left to right in a period.
संबंधित प्रश्न
Arrange the following as per the instructions given in the brackets:
Na, K, Cl, S, Si (increasing order ionization energy)
Is is metal or non-metal?
Explain the following:
Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
Choose the correct answer.
An alkaline earth metal
(i) Lead
(ii) potassium
(iii) calcium
(iv) Copper
Among the elements of the second period, Li to Ne, pick out the element that is the most reactive non-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 ?
State whether the following statement is true or false
All members of zero group are non metals.
In the third period, which is the most metallic and most non-metallic element?
If an element is in group 7 is it likely to be metallic or non metallic in character?
Supply the missing word from the words given in brackets.
If an element has one electron in its outermost energy level, then it is likely to be _ (metallic, non metallic)
Identify the metallic oxide which is amphoteric in nature.
The tendency of an element to form cation is the _______ character of that element.
Write the name.
The atom having the smallest atomic radius from zero group.
Write the name.
Two elements having two orbits.
Write an Explanation.
Electropositivity
Write scientific reason.
The non-metallic character increases while going from left to right in a period.
An element has atomic number 17. To which group, the period does it belong? It is metal or non-metal?
Metals are good ______ because they are electron ______.
The given table shows elements with the same number of electrons in its valence shell.
| Elements | A | B | C |
| m.p. | 63.0 | 180.0 | 97.0 |
Arrange them in order of increasing metallic character.
