Advertisements
Advertisements
प्रश्न
Name or state following with reference to the element of the first three periods of the periodic table.
The non-metallic element present in period 3 other than sulphur and chlorine.
Advertisements
उत्तर
P [Phosphorus]
APPEARS IN
संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Elements in the same period have equal valency
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?
What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?
(a) increases
(b) decreases
(c) remain the same
(d) first increases then decreases
The atomic numbers of three elements A, B and C are given below:
| Element | Atomic number |
| A | 5 |
| B | 7 |
| C | 10 |
(i) Which element belongs to group 18?
(ii) Which element belongs to group 15?
(iii) Which element belongs to group 13?
(iv) To which period/periods do these elements belong?
Periodicity is observed due to the similar ______.
'In a group, the atomic radii increase with increasing period number', explain this statement and justify it with reference to group 17.
Arrange the following in order of increasing radii:
Mg2+, Mg, Mg+
Element P has atomic number 19. To which group and period, does P belong? Is it a metal or a non-metal? Why?
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of the element in period 3 having atomic number 17.
