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प्रश्न
Name the non-metals present in period 2 and metals in period 3.
उत्तर
C, N, O and F are non-metals present in period 2 while Na, Mg and Al are metals in period 3.
संबंधित प्रश्न
Fill in the blank in the following statement:
On moving form right to left in the second period, the number of valency electrons ...............
Name the element of lower nuclear charge out of Be and Mg.
In the following table, the positions of six elements A, B, C, D, E and F are given as they are in the Modern Periodic Table :
 |
1 | 2 | 3-12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 2 | A | B | C | D | |||||
| 3 | E | F |
On the basis of the above table, answer the following questions :
(i) Name the element which forms only covalent compounds.
(ii) Name the element which is a metal with valency three.
(iii) Name the element which is a non-metal with valency three.
(iv) Out of B and C, whose atomic radius is bigger and why ?
(v) Write the common name for the family to which the elements D and F belong.
State whether the following statement is true or false
On moving horizontally across a period, number of valence electrons increases from one to eight.
Select the correct answer
Number of shells in potassium are
Select the correct answer
Most reactive character among the elements given below is found in
Arrange the following as per instruction given in the bracket.
Cl, F, Br, I (increasing electron affinity)
Arrange the following in order of increasing radii:
Mg2+, Mg, Mg+
Choose the word or phrase from the bracket which correctly complete each of the following statement:
Metals are good ................. (oxidising agents/reducing agents) because they are electron ............. (acceptors/donors).
State the following:
The group to which the element with an electronic configuration of 2, 8, 2 belongs.
