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प्रश्न
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
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उत्तर
| Element/Radical | Symbol | Valency |
| Sulphur [Sulphide] | S | two |
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संबंधित प्रश्न
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
How does the metallic character of elements in Modern Periodic Table vary on moving from left to right in a period, and (ii) down a group?Give reason to justify your answer.
What is the number of valence electrons in the atoms of first elements in a period?
Name two elements in Alkaline earth metals.
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Compare Modern Periodic Law with Mendeleev's Periodic Law.
The modern periodic table is divided into which blocks?
Distinguish between:
s-block - p-block
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
