Advertisements
Advertisements
प्रश्न
What is the number of elements in the 3rd period, of the modern periodic table?
Advertisements
उत्तर
There are eight elements in the third period.
APPEARS IN
संबंधित प्रश्न
Write the merits of the modern periodic table over Mendeleev’s Periodic table
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
Define:
Periodic table
Name two elements in each case:
Transition element
Name an alkali metal in period 3 and halogen in period 2.
Give the chemical formula of calcium phosphate
Distinguish between:
Group 17 - Group 18
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
A and F
