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प्रश्न
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
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उत्तर
Group number signifies the number of electrons in the outer shell of an atom of the element.
- Number of electrons in the outer shell of all elements in a group is the same.
- Hence all elements in the same group of the periodic table have the same ‘Valency’ and similar ‘Chemical properties’.
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संबंधित प्रश्न
On which side of the periodic table will you find metals?
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Distinguish between:
Group 17 - Group 18
What is the symbol of the element Tungsten?
Which of the following statements about the Modern Periodic Table is correct:
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?
Which of the following elements does not lose an electron easily?
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
Spot the error:
The elements of group 13 are called the carbon family.
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:
E and B
