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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
The elements 4Be, 12Mg and 20Ca, each having two valence electrons in their valence shells, are in periods 2, 3 and 4 respectively of the modern periodic table. Answer the following questions associated with these elements, giving reason in each case:
(a) In which group should they be?
(b) Which one of them is least reactive?
(c) Which one of them has the largest atomic size?
How does the valency of elements change of moving from left to right in the third period of the periodic table?
What is the common feature of the electronic configuration of the elements at the end of period 2, and period 3?
State whether the following statement is true or false
On moving horizontally across a period, number of valence electrons increases from one to eight.
'In a group, the atomic radii increase with increasing period number', explain this statement and justify it with reference to group 17.
How many elements are there in period 2?
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element.
Name or state following with reference to the elements of the first three periods of the periodic table.
The number of electron shells in elements of period 1, period 2, and period 3.
Name or state following with reference to the element of the first three periods of the periodic table.
A metal in period 3 having valency 3.
Fill in the blanks from the words A to F given below.
A: Decreases
B: Increases
C: Remains same
D: Increases by one
E: Electropositive
F: Electronegative
Down a group in the Modern Periodic Table.
No. of electron shells __________; No. of valence electrons ________; Electronegativity ________ Character of elements changes from _________ to ____________.
