As part of a science exhibition, four groups of students prepared models to explain Dalton's Atomic Theory using coloured clay balls.
- Group A used identical red balls to represent oxygen atoms and identical white balls to represent hydrogen atoms. They explained that atoms of the same element are identical.
- Group B joined two white balls and one red ball to represent water, showing that atoms combine in a fixed ratio.
- Group C rearranged the same clay balls to show how reactants change into products without adding or removing any balls.
- Group D claimed that during a chemical reaction, some atoms disappear while new atoms are produced.
The science teacher asked the class to analyse the models using Dalton's Atomic Theory.
Answer the following questions with the correct answers.
1. Which Dalton's postulate is illustrated by Group B's model? -
2. What does Group C's model demonstrate? -
3. Which law is explained by Group C's model? -
4. Which Dalton's postulate is common to the explanations given by Groups A, B and C? -