CBSE Class 9 Chemistry Basic Units Of Matter
- how to calculate a molecular mass?
- an element x show 2 valancies of 3&5. workout the formula of 2 oxide of this element.
- What is the difference between atom and ion
- Who tells that atom is smallest unit of life
- 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
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