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प्रश्न
An element A has 2 electrons in its fourth shell. State:
is it an oxidising or reducing agent
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उत्तर
It is a Reducing agent.
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संबंधित प्रश्न
Two elements ‘A’ and ‘B’ belong to the 3rd period of Modern periodic table and are in group 2 and 13, respectively. Compare their following characteristics in tabular form:-
(a) Number of electrons in their atoms
(b) Size of their atoms
(c) Their tendencies to lose electrons
(d) The formula of their oxides
(e) Their metallic character
(f) The formula of their chlorides
How do the atomic size and metallic character of elements vary as we move :-
(a) down a group and
(b) from left to right in a period
Fill in the blank in the following statement:
In going across a period (right to left) in periodic table, the atomic size of the atom ...............
Fill in the blank in the following statement:
On going down in a group in the periodic table, the metallic character of elements ...............
How does the number of:
valence electrons and
Calculate the valency of element X whose atomic number is 9.
Formula of ion of A is A2+. Element A probably belongs to ______ group.
Based on the group valency of element write the molecular formula of the following compound giving justification:
Halide of the elements of group thirteen
State the following:
The group to which the element with an electronic configuration of 2, 8, 2 belongs.
There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively.
Classify the above elements as metals and non-metals.
