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प्रश्न
Define:
Periodic table
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उत्तर
The periodic table is a tabular arrangement of elements in horizontal rows, called periods, and vertical columns, called groups, to classify elements and facilitate their systematic study.
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संबंधित प्रश्न
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
Write a short note.
Structure of the modern periodic table.
What is the number of elements in the 1st period?
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
Give the symbol and valency of the following element and radical.
Ammonium
State what is meant by the term chemical formula.
State the number of elements in Period 3 of the Periodic Table.
What is the symbol of the element Tungsten?
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
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
