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प्रश्न
State the following:
The group which contains highly electropositive metals including sodium.
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उत्तर
1 [I – A] group contains highly electropositive metals.
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संबंधित प्रश्न
Which element has a total of two shells, with three electrons in its valence shell?
The atomic radii of three elements X, Y and Z of a period of the periodic table are 186 pm; 104 pm and 143 pm respectively. Giving a reason, arrange these elements in the increasing order of atomic numbers in the period.
For each of the following triads, name the element with the characteristics specified below:
| Elements | Least atomic radius | Chemically least reactive |
| (i) F, Cl, Br (ii) Li, Na, K |
.................... .................... |
.................... .................... |
The atomic number of an element is 20. In modern periodic table, this element is placed:
(a) 2nd period
(b) 4th period
(c) 3rd period
(d) 1st period
How does the number of:
valence electrons and
An element X belong to 3rd periods and group II of the periodic table state:
name of the element,
Fill in the blank
There are ______ groups and ______ periods in the modern form of periodic table.
An element A has 2 electrons in its fourth shell. State:
its valency
Name or state following with reference to the elements of the first three periods of the periodic table.
A metalloid in period 2 and in period 3.
State the following:
The group to which the element with an electronic configuration of 2, 8, 2 belongs.
