Matter

Define Matter? Give Example

What is the difference between physical and chemical properties?

Define Substances ad mixture? Give examples

Matter = ________and Substances

Mixture can be ______ and __________

Define Element, Symbols and Valency with examples

Till now, how many elements have been discovered?

• 63

• 92

• 118

• 117

Valency of Cl in hydrochloric acid is

• 3

• 2

• 1

• 4