You came to know that the Diamond is a hardest material and it is a non metal and similarly. Mercury is a soft material and it is a metal. Write down the questions raised in your mind.

After completion of metals and non metals chapter. Raheem understood that metals are hard and non metals are soft. During the discussion with his brother he came to know that Diamond is a hardest material and it is a non metal. Similarly mercury is a soft material and it is a metal. These findings from the discussion raised some questions in Raheem’s mind. Can you guess those questions? Write them. (AS_(2))

Write an experiment to know the reaction of oxygen with metals and non-metals.

Now observe carefully all the materials that you have listed above as metals and non metals Can you group materials into two categories by looking at their properties ?

How do you know the valence of a non-metal?

How do you sort materials as solids, liquids and gases ? Write your answer with an example.

_________properties betterjudge a material is metal or non-metal.

Now observe carefully all the materials that you have listed above as metals:Are they hard or soft ?

Now observe carefully all the materials that you have listed above as metals:Do all of them shine ?

What are the materials required to prepare and test the hydrogen gas in the lab by using acid and metal ? Where do you observe the evolved hydrogen gas ?

Dumping of waste material made up of metals and non metals leads to environment pollution. Do you support the statement? Give your justification with suitable examples.