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प्रश्न
Two elements ‘P’ and ‘Q’ belong to the same period of the modern periodic table and are in Group 1 and Group 2, respectively. Compare their following characteristics in tabular form:-
(a) The number of electrons in their atoms
(b) The sizes of their atoms
(c) Their metallic character
(d) Their tendencies to lose electrons
(e) The formula of their oxides
(f) The formula of their chlorides
उत्तर
| Characteristic | Comparison | |
| a | The number of electrons in their atoms | The number of electrons in Q is more compared to P (Q > P). |
| b | The sizes of their atoms | The size of atom P is more than atom Q (P > Q). |
| c | Their metallic character | P is more metallic than Q (P > Q). |
| d | Their tendencies to lose electrons | P will lose electrons more easily than Q. |
| e | The formula of their oxides |
Oxide of P is P2O. Oxide of Q is QO. |
| f | The formula of their chlorides |
Chloride of P is PCl. Chloride of Q is QCl2. |
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संबंधित प्रश्न
The elements Be, Mg and Ca each having two electrons in their outermost shells are in periods 2, 3, and 4 respectively of the modern periodic table. Answer the following questions, giving justification in each case:-
(i) Write the group to which these elements belong.
(ii) Name the least reactive element.
(iii) Name the element having largest atomic radius.
How does Nature of oxides of elements change on going from left to right in a period of the periodic table?
Give examples in support of your answer.
How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?
How does the tendency to lose electrons change as we go down in group 1 of the periodic table? Why does it change this way?
Which of the following set of elements is written correctly in the order of their increasing metallic character?
(a) Mg, Al, Si
(b) C, O, N
(c) Na, Li, K
(d) Be, Mg, Ca
Why sodium element of group 1 and chlorine element of group 17 both have valency 1?
Name the element in period 3 which does not form oxide.
The following questions refer to the Periodic Table.
Name the first and last element in period 2.
(a) Fill in the blanks and rewrite the completed statements:
(i) ________ group in the periodic table contains elements that are all gases at room temperature.
(ii) Very fine particles mainly scatter ______ light.
Based on the group valency of element write the molecular formula of the following compound giving justification:
Compound formed when an element A of group 2 combines with an element B of group seventeen.
