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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:
Cl, F, Br, I (increasing order of electron affinity)
Is is metal or non-metal?
Name the periodic property which relates to the character of element which loses one or more electrons when supplied with energy.
Explain the following:
Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
How does the chemical reactivity of
alkali metals vary?
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.
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.
Mg2+, Cu2+, Na1+, H1+ (In the order of preferential discharge at the cathode)
State whether the following statement is true or false
All members of zero group are non metals.
If an element is in group 7 is it likely to be metallic or non metallic in 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). Answer the following question in relation to the given group of elements:
Which element has the most metallic character?
Match the atomic number with the following:
A metal of valency one.
The tendency of an element to form anion is the ______ character of that element.
Write scientific reason.
The metallic character of elements increases while going down the groups.
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
Choose the odd one out and write the reason:
Arrange:
Be, Li, C, B, N, O, F (in increasing metallic character).
