Advertisements
Advertisements
प्रश्न
State modern periodic law.
Advertisements
उत्तर
It states that "The physical and chemical properties of the elements are a periodic function of their atomic numbers." According to this law, if we arrange the elements based on their increasing atomic numbers, we find that the elements with similar physical and chemical behaviour will be grouped together after a certain interval of elements.
APPEARS IN
संबंधित प्रश्न
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
The modern periodic table was prepared by ______.
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
What are the groups in a periodic table? Give two characteristics of each.
Name the type of elements which have one electron short of octet.
Give the symbol and valency of the following element and radical.
Zinc
Distinguish between:
s-block - p-block
Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.
| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
- What is A element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
How does the property vary in periods and in groups?
Match the atomic number with the following:
An element of group 2.
