E/S Ch. 2

E/S Ch. 2

1. Atomic Number: number in top corner or right above letter; number of protons (and electrons bc you have to have a balanced atom

2. atoms have no overall electrical charge

3. Atomic Mass: atomic number - atomic mass = number of neutrons; round to nearest whole number

4. Ion: atom that has a different number of elections, giving it a positive or negative charge, rather than a neutral charge

5. Isotope: same amount of protons, but different number of neutrons