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प्रश्न
Arrange the following as per instruction given in the bracket.
Mg, Cl, Na, S, Si (decreasing order of atomic size)
उत्तर
Mg, Cl, Na, S, Si (decreasing order of atomic size)
Na > Mg > Si > S > Cl
186 pm > 160 pm > 117 pm > 104 pm > 99 pm
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संबंधित प्रश्न
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
F, Cl and Br are the elements each having seven valence electrons. Which of these (i) has the largest atomic radius, (ii) is most reactive? Justify your answer stating reason for each.
Explain, the statement 'In each period, the atomic radii gradually decrease with increase in atomic number'. Give one example to justify your answer.
What is the common feature of electronic configurations of the elements at the end of period 2 and period 3?
Arrange the following as per instruction given in the bracket.
K, Pb, Ca, Zn (increasing reactivity)
Element P has atomic number 19. To which group and period, does P belong? Is it a metal or a non-metal? Why?
(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.
Name the elements in the correct order of their increasing atomic numbers present in the first, second, and third short periods of the periodic table.
State which of the elements are –
- metallic
- non-metallic
- noble gases
in each of the periods 2 and 3.
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of elements in group 1 [I–A].
Select the correct answer from the options given below.
It is a metal in period 2 having electronic configuration 2, 1?
