ICSE Class 8: Elements, Compounds and Mixtures Videos | Classification of matter

• The valency of Ca in Ca³ (PO?)² is:
•                                                                      What are the numbers of element present ??  
• Match the atomic number 4,14,8,15,19 with the each of the following : (a) A solid non metal of valency 3 (b) A gas of the valence 2 (c) A metal of the valence 1 (d) A non metal of the valence 4 
• A homogeneous mixture made up of carbon
• What are MIXTURES??
• What are mixtures? Deply explain
• Differentiate between pure and impure subtance
• What are periods  
• How is sodium chloride different from it's constituent elements
• Properties of sodium and zinc.  

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