Atomic Structure

Vocab

100

Unit of matter, the smallest unit of a chemical element

Atom

200

A particle with a positive charge

Proton

300

Atoms of the same element, but different number of neutrons

Isotope

400

Atoms that have a negative charge

Anion

500

Outermost energy level of an atom

Valence Shell

Lewis Dot Structure

100

Lithium

Li .

200

Radium

   .

  Ra .

300

Krypton

   ..

: Kr :

   ..

400

Phosphorus

  .

. P :

  .

500

Iodine

  ..

: I :

   .

PEN

100

14  3-

   N

7

P = 7

E = 10

N = 7

200

9       +2

    Be

4

P = 4

E = 2

N = 5

300

23      +1

     Na

11

P = 11

E = 10

N = 12

400

84      -5

    Kr

36

P = 36

E = 41

N = 48

500

210      +43

      Fm

100

P = 100

E = 57

N = 110

Scientists

100

Electron Orbitals

Neils Bohr

200

Believed that the atom was the smallest unit of matter

Democritus

300

Gold Foil Nucleus

Ernest Rutherford

400

Father of atom

John Dalton

500

Plum Pudding Model

JJ Thompson

Formulas

100

Atomic Number =

Number of Protons

200

Protons + Neutrons =

Mass Number

300

Protons - Electrons = 

Charge

400

Mass Number - Protons = 

Number of Neutrons

500

Protons - Charge = 

Number of Electrons