Question

Short answer questions. 1. What is an atom? 2. Mention important characteristics of a pure substance. 3. Write names and symbols of any five metals and five non-metals. 4. Write down the chemical formulae of the following compounds: a. Water b. Zinc oxide c. Zinc sulphide d. Magnesium oxide e. Calcium oxide f. Lead sulphide g. Nitrogen dioxide h. Copper oxide 5. What is meant by the terms homogeneous mixture and heterogeneous mixture? Give two examples of each. 6. What is the basis of selecting a separation technique for a given mixture? 7. What do you mean by magnetic separation? 8. Iron and sulphur when mixed form a mixture and when this mixture is heated it forms iron sulphide. How will you prove that the iron sulphide formed in the process is a compound?​

Answer 1

Answer:

the smallest particle of a chemical element that can exist.

Answer 2

Answer:

An atom is  is group of electrons protrons and newtrons which are chemistry terms,

Explanation: