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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)
Name any five periods properties.
Name the periodic property which relates to the character of element which loses one or more electrons when supplied with energy.
The electronic configuration of an element T is 2, 8, 8, 1.
Is it a metal or a non-metal?
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
Write a scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
Which non-metallic element has the valency of 2?
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?
Explain
Larger the atomic size, more metallic is the element.
Explain
Group 17 elements are non-metals, while group 1 elements are metals.
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.
Match the atomic number with the following:
A metal of valency one.
The tendency of an element to form cation is the ______ character of that element.
Electropositivity means ______.
The metallic character of the element decreases moving across a period from left to the right.
Right or wrong sentence.
Silicon is a metallic element.
The metal which is hard and has a high melting point and used in filaments of electrical bulbs is ______
Identify the elements with the following property and arrange them in increasing order of their reactivity
- An element which is a soft and reactive metal
- The metal which is an important constituent of limestone
- The metal which exists in liquid state at room temperature
