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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
The electrons in the atoms of four elements A, B, C and D are distributed in three shells having 1, 3, 5 and 7 electrons in the outermost shell respectively. State the period in which these elements can be placed in the modern periodic table. Write the electronic configuration of the atoms of A and D and the molecular formula of the compound formed when A and D combine.
Classify the following elements into metals, non-metals and metalliods
As, C, Hg, Mg, S, Si
Calculate the mass of Calcium that will contain the same number of the atom as are present in 3.2 gm of Sulphur.
[Atomic masses: S=32, Ca=40]
Fill in the blank in the following statement:
The tendency to gain an electron ............... on moving down in a group of the periodic table.
An element has 2 electrons in its N shell.
State the name assigned to this group.
How does the number of:
valence electrons and
K, Pb, Ca, Zn (In the increasing order of the reactivity)
What is the common feature of electronic configurations of the elements at the end of period 2 and period 3?
Give the number of the group and the period of elements having three shells with three electrons in valence shell.
State the nature of compounds formed when group 17 elements combine with (i) metals (ii) non-metals.
