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प्रश्न
Write an explanation.
Electronegativity
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उत्तर
Electronegativity is the tendency of an atom to attract the shared pair of electrons towards itself in a chemical bond. Elements with high electronegativity strongly pull electrons, while those with low electronegativity tend to lose electrons easily. Electronegativity decreases down a group due to increased atomic size and increases across a period due to increasing nuclear charge.
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संबंधित प्रश्न
Arrange the following as per the instructions given in the brackets:
Na, K, Cl, S, Si (increasing order ionization energy)
Explain the following:
Group 17 elements are strong non-metals, while group 1 elements are strong metals.
The elements at the bottom of a group would be expected to show ______ metallic character than the element at the top.
In Period 3, the most metallic element is ______.
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 ?
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?
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.
Within a group, where would you expect to find the element with the greatest metallic character.
Identify the metallic oxide which is amphoteric in nature.
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.
The non-metallic character of the elements :
The metallic character of the element decreases moving across a period from left to the right.
3, 1, 2 electrons are in valence shells of X, Y, Z elements resp. From this information, write the name of the groups it belongs to and its valency.
Three elements B, Si and Ge are
Which of the following metal (s) do not react with water?
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.
