ICSE Class 9 Chemistry Modern Periodic Table
- C is in Group 4. So, the hydride will be _____.
- What is the f block known as ?
- what are alkaline earth metal
- How many period and groups are there in modern periodic table
- send me vallencies of all elements
- Moving down in the second group number of valence electrons.........
- electric bulbs are filled with inert gases and sealed
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