CBSE Class 9 Chemistry Basic Units Of Matter
Sample Q&A
- how are molecules formed?
- Define Atom
- what is kinetic energy?
- What type of iron is (CO3)2. Discuss
- An element X has a valancy 3.write the formula of its oxide
- Write the molecular formula of aluminum oxide
- what is valency?
- velency of the element in halogen group is ................
- How can we write chemical formulas
- How is valency calculated? Why some elements have two or more valencies?
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