Which components of a galaxy move in circular patterns or revolve around a star?
1 answer:
You might be interested in
Explanation:
Just a few things to remember:
- # of neutrons = Mass number - # protons
- Mass number = # protons + # neutrons
- Atomic Number = # of protons
- # of electrons = # of protons - charge on the atom
- Symbol - use the atomic number to find the element in the periodic table
