Look at the diagram. what type of cell is shown by number 4?

I'm guessing it's a muscle cell. Please say the topic you're studying so I can have a better understanding.

i think that c)gold was found there

but i am not sure

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.