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प्रश्न
Fill in the blank
Reactivity ______ down the gruop for alkali metals with increase in electropositive character
उत्तर
Reactivity increases down the gruop for alkali metals with increase in electropositive character.
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संबंधित प्रश्न
Arrange the following as per the instruction given in the brackets :
F, Cl, Br (Increasing electronegativity)
In terms of electronic configuration, what the elements of a given period and groups have in common?
Explain
K is more reactive than Li.
Explain
Electronegativity of Cl is higher than S.
The electro negativities (according to Pauling) of the elements in period 3 of the periodic table are as follows.
The elements are arranged in alphabetical order:
Al Cl Mg Na P S Si
1.5 3.0 1.2 0.9 2.1 2.5 1.8
(i) Arrange the elements in the order in which they occur in the periodic table from left to right.
(The group 1 elements first, followed by the group 2 element and so on, up to group 7)
(ii) Choose the word or phrase from the brackets which correctly completes each of the following statements:
(a) The element below sodium in the same group would be expected to have a ______ (lower/higher) electro negativity than sodium and the element above chlorine which would be expected to have a ______ (lower / higher) ionization potential than chlorine.
(b) On moving from left to right in a given period, the number of shells ______ (remains the same / decreases/ increases).
(c) On moving down a group, the number of valence electrons ______ (remains the same / increases/ decreases).
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (decreasing electronegativity)
The element below sodium in the same group would be expected to have a ______ (lower/higher) electro-negativity than sodium and the element above chlorine would be expected to have a ______ (lower/higher) ionization potential than chlorine.
The changes in the properties of elements on moving from left to right across a period of the Periodic Table. For the property, choose the correct answer.
The electronegativity:
Answer the following question using the data given below:
- Assertion: The nature of bond in HF molecule is ionic
- Reason: The electronegativity difference between H and F is 1.9.
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 would be expected to have the highest electronegativity?
