1. Atoms, Ions, Isotopes Changing atoms

2. Element Substance with a characteristic set of properties Examples?

3. Atom Smallest unit of an element that has all of its properties

4. Add or subtract a proton What do you get? Boron atom Carbon atom ►A new element

5. Add or subtract an electron What do you get? An ion An ion is a particle with a charge because it has an unequal number of protons and electrons

6. Subtract an electron Hydrogen Hydrogen Ion ► An ion with a positive charge because it has more protons than electrons +

7. Add an electron Fluorine Fluorine Ion - ► An ion with a negative charge because it has more electrons than protons

8. Add or subtract a neutron What do you get? An isotope An isotope is a particle with extra neutrons

9. Hydrogen isotopes Hydrogen Deuterium ► An isotope has a different number of neutrons

10. Add another atom What do you get? A molecule A molecule is 2 atoms joined together with a bond

11. Hydrogen molecule