Pls help!!
!!!!!NO LINKS!!!!!
you don't have to help with all just one would help so much
1. If an atom has 9 protons and 10 neutrons, what would be its atomic mass?
2. If a neutral atom has 6 protons, how many electrons would it have?
3. If an atom has 9 protons and 10 electrons, what is its charge?
4. If an atom has 20 protons and 18 electrons, what is its charge?
5. The mass number of an atom of potassium is 39. Using the periodic table, identify the atomic number, the number of neutrons, and the number of protons in this atoms
6. If an atom lost an electron, what would its charge be?
7. if an atom gains two electrons, what would its charge be?