Advertisements
Advertisements
प्रश्न
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 |
.................... .................... |
.................... .................... |
उत्तर
Elements | Least atomic radius | Chemically least reactive |
(i) F, Cl, Br | F | Br |
(ii)Li, Na, K | Li | Li |
APPEARS IN
संबंधित प्रश्न
Na, Mg and Al are the elements of the same period of Modern Periodic Table having, one, two and three valence electrons respectively. Which of these elements (i) has the largest atomic radius, (ii) is least reactive? Justify your answer stating reason for each case.
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
How does the atomic size vary on going down from top to bottom in a group of the periodic table? Why does it vary this way?
Why does the size of the atoms progressively become smaller when we move from sodium (Na) to chlorine (Cl) in the third period of the periodic table?
In each of the following pair, choose the atom having the bigger size:
(a) Mg (At. No.12) or Cl (At. No.17)
Fill in the blank
Oxidising property ________from fluroine to iodine because the power to accpet electron decreases.
How could the atomic radius of a noble gas be compared with the other elements in a period?
State the nature of compounds formed when group 17 elements combine with (i) metals (ii) non-metals.
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].
Give a reason for the following:
A transition from metallic to non-metallic elements is seen on moving from left to right in a period of the periodic table.