I need topic ideas for a presentation it can be anything

If an atom has 35 protons in the uncles , how many elements will it have orbiting the nucleus

In a market economy, what does a producer mean when it asks, "is there a market for my products? is there a place where we can sell our products? " "ls our product being made more cheaply overseas? " will consumers need and want to buy our products? " will the government support demand for our products? "

Who was the macedonian conqueror of greece and builder of an empire?