1. The Atom Nucleus center of atom. contains neutrons contains protons Neutrons neutral charge N 0 1.67 x 10 -27 mass in the nucleus

2. Protons Positive charge P + 1.67 x 10 -27 Mass Found in the nucleus Electrons Negative charge e- 9.11 x 10 -31 Mass Found outside nucleus in energy levels /shells in a specific orbital

3. Electrons can be found in 1 of 4 shells 1 st shell holds 2 electrons 2 nd shell holds 8 electrons 3 rd shell holds 18 electrons 4 th shell holds 32 electrons

4. Electrons can be found in 1 of 4 orbitals in the shells S,p,d or f S orbital lowest level 2 electrons sphere shape

5. P orbital Holds 6 electrons dumbell shape xyz D orbitalholds 10 electrons F orbital holds up to 14 electrons and is the highest energy level

6. The last shell electrons are found in;is called the valence shell valence electronsThese electrons are then called the valence electrons and they are what determine if the atom will bond with anything else or not.

7. The Atom All atoms are neutral so … Protons which are positive must equal electrons which are negative ( cancel each other out) WKRP Atom Explanition