Fill in the blank spaces:
(i) When a chemical change takes place in matter, we commonly say a ___________ reaction takes place. [physical/chemical]
Fill in the blank spaces:
(i) When a chemical change takes place in matter, we commonly say a ___________ reaction takes place. [physical/chemical]
Physical reaction: When molecules undergo a molecular rearrangement such as their shape, size, colour, condition, or appearance, to cause a physical change, this is called a physical reaction.
Chemical reaction: A chemical reaction happens when molecules interact with one another and undergo chemical changes, such as their bonds breaking or making.
Burning wood is an example of a chemical reaction in which wood is changed into carbon dioxide, water vapour, and ash in the presence of heat and oxygen.
Therefore, when a chemical change takes place in matter, we commonly say a chemical reaction takes place
Physical reaction: When molecules undergo a molecular rearrangement such as their shape, size, colour, condition, or appearance, to cause a physical change, this is called a physical reaction.
Chemical reaction: A chemical reaction happens when molecules interact with one another and undergo chemical changes, such as their bonds breaking or making.
Burning wood is an example of a chemical reaction in which wood is changed into carbon dioxide, water vapour, and ash in the presence of heat and oxygen.
Therefore, when a chemical change takes place in matter, we commonly say a chemical reaction takes place
