An atom can be compared to our solar system because:

If you compare pictures of an atom and our solar system, it seems that they are both assembled the same way with the sun and nucleus being the same and the electrons and planets orbiting the same.

100%sorry if i’m wronghope this good luck: )

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