Question

i just got this question: 50 Observable things pertaining to Chemistry and i dont really uderstand what to write down

Answer 1

Here's two
1. Alkali Metals will create a spark(s) when reacting with water.
2. Sometimes CO2 will be given off as one of the products from a chemical reaction.

Answer 2

Here are three more :)
3. An exothermic reaction produces heat and light (think match being lit)
4. Water undergoes physical changes as it moves from one phase to another.
5. The periodic table can help predict bonding based on the way it has been organized.