Look at the picture below. True or false? Crude oil can be separated by physical methods and this tells us that it is not a compound

It would be (at) + cu (s)

Elias is almost correct. he just got it backwards.the correct answer is that it demonstrates elastic potential energy transforming into kinetic energy.

You know how the first one if filled up like the objects do the same but with the other categories

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom