Give two example of elements.

One Line Answer

Example: Hydrogen, Oxygen is made from atoms containing a single proton and a single electron.

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Chapter 3: Matter Around Us - Evaluation [Page 39]

Chapter 3 Matter Around Us
Evaluation | Q V. 9. | Page 39

Classify the following substances into compounds and mixtures:

Write true or false

All pure substances have characteristic melting and boiling points.

Name the substance you will add to speed up sedimentation.

Name: a Non-metal Which is a Good Conductor of Electricity.

Give one use of the following substance:
Iron

Tick (√) the correct alternative from the choice given for the following statement

A metal which is brittle

Give the name of the radical - NO₃

Select the correct answer from the choice given below.
The type of molecule- bromine

Explain the difference between Metals and non-metals.

Name the element which is used in toothpaste to strengthen our teeth.