Advertisements
Advertisements
प्रश्न
Write an Explanation.
Electronegativity
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:
The element B would have ______ metallic character than A.
Answer the following in respect of element `31/15 P `
Is it a metal or non - metal
Give the trend in metallic character:
down the group top to bottom.
Explain the following:
Metallic character of elements decreases from left to right in a period while it increases in moving down a group.
An element X belong to 3rd periods and group II of the periodic table state:
whether it is 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).
A metal M forms as oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal.
Choose the correct answer.
An alkaline earth metal
(i) Lead
(ii) potassium
(iii) calcium
(iv) Copper
Mg2+, Cu2+, Na1+, H1+ (In the order of preferential discharge at the cathode)
In the third period, which is the most metallic and most non-metallic element?
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.
Silicon is a metallic element.
Electronegativity is the metallic property of an element.
Write scientific reason.
The non-metallic character increases while going from left to right in a period.
3, 1, 2 electrons are in valence shells of X, Y, Z elements. From this information, state the group in which they belong and write their valencies.
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
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (increasing metallic character)
Arrange:
Be, Li, C, B, N, O, F (in increasing metallic character).
