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प्रश्न
Name and state the following with reference to the elements of the first three periods of the periodic table.
A covalent compound formed by an element in period 2 and a halogen.
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उत्तर
Carbon tetrachloride (CCl4)
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
Write the merits of the modern periodic table over Mendeleev’s Periodic table
Give two example of group 1 elements.
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
Name two elements in each case: Lanthanides
State its position in the periodic table?
Give the chemical formula of sodium hydroxide
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
Find the correlation:
Mendeleev’s periodic table : atomic mass : : Modern periodic table : _______
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 an element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
