FILL IN THE BLanks1. The two classification of the mixtures are&..2 Dust in the air is an example of....mixture.3. An example of a monoatomic molecule is4 Valency of an element X is 3. Write the chemical formula of its oxide.5. Write the electronic configuration of an element whose atomic number is 11.8. The substances that react together in a chemical reaction are called9 Magnesium +Magnesium nitride.TO. Plants and animals needfor their growth and functioning.11. The boiling point of liquid nitrogen is12is a non-combustible gas but is a good supporter of combustion.13. Matter has mass and occupies..14. The change of a solid into liquid.15. The change of vapour into a liquid16. The gaseous state of a liquid is called.is an alloy made from mixing copper and tin.18is also used electroplating metal articles to prevent corrosion.19. Ferrous sulphate is used to treat20. Magnesium is an essential element both inand21. Latin name of potassium is.are fixed paths in which electrons move around the nucleus.​