4. Write the chemical formulae of the following
4. Write the chemical formulae of the following. 5. Give the names of the elements present in the following compounds.
science class 9
3. What are polyatomic ions? Give examples.
Question 3. What are polyatomic ions? Give examples.
Science Class 9 Chapter 3 Atoms & Molecules Exercise Solution
Science Class 9 Chapter 3 Atoms & Molecules Exercise Solution.
Which of the following are chemical changes?
Which of the following are chemical changes?(a) Growth of a plant(b) Rusting of iron(c) Mixing of iron filings and sand(d) Cooking of food(e) Digestion of food(f) Freezing of water(g) Burning of a candle.