Planets appear to move in the sky against the backdrop of the . other planets b. the stars c. the sun d. the moon

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

Maybe you should get some from your teacher and learn more so you can get your grades up and maybe study a bit more