1. Snapshot • __(1)___ is anything that has mass and takes up space. • All matter is made up of ___(2)__. • Convert the following • .56 L= _(3)_ mL • 34.8 dm = _(4)__ dam • __(5)__ are created by combining an acid and a base.

2. Snapshot • Which is larger a dkl or a dl? • Convert the following into scientific notation • 34508 • 89.43 • .000621 • List the steps of the scientific method in order?

3. PS.3 The Atom Model The student will investigate and understand the modern and historical models of the atomic structure.

4. Parts of an Atom • Subatomic particles • 3 types • Protons • Positively charged ( + ) • Set amount for each element • Equals the atomic number • Electrons • Negatively charged ( - ) • Neutrons • No charge = neutral ( 0 ) PS.3 Atomic Model: The student will understand the historical & modern model of the atomic structure

5. Locations within the Atom • Nucleus • Central part of an atom • Where majority of mass is located • Contains protons & neutrons • Electron cloud • Orbitals or shells • Where electrons are located constantly moving PS.3 Atomic Model: The student will understand the historical & modern model of the atomic structure

6. 195 North (Powhite Parkway) Can hold 8 electrons Sweet Frog CarytownContains protons & neutrons Energy Street Can hold 2 electrons Matterville Interstate 95 N Can hold 18 electrons

7. 3rd Verse: Neutrons can be found, Where protons hang around; Electrons they surround The Atoms Family. Chorus Chorus: They are so small. (Snap, snap) They’re round like a ball. (Snap, snap) They make up the air. They’re everywhere. Can’t see them at all. (Snap, snap) 1st Verse: They’re tiny and they’re teeny, Much smaller than a beany, They never can be seeny, The Atoms Family. Chorus 2nd Verse: Together they make gases, And liquids like molasses, And all the solid masses, The Atoms Family Chorus

8. Snapshot • A smaller part of an atom is called a __(1)__. • __(2)__ is the part of the atom where _(3)___ and neutrons are found. • __(4)___ have a negative charge and are equal to the number of __(5)___ in a neutral atom. • __(6)___ have no charge.

9. Model • Scaled version of an original • Used in studying the atom • 5 Models • Dalton • Thomson • Rutherford • Bohr • Electron-Cloud

10. Democritus & Dalton • ~ 400 B.C. • Greek philosopher • Said all matter made up of small particles • Named particles Atomos • Un-cuttable • He was unable to prove his idea • John Dalton found proof in 1800’s • Solid sphere PS.3 Atomic Model: The student will understand the historical & modern model of the atomic structure

11. Thomson • 1904 • Positive sphere with negative parts embedded • Chocolate chip cookie model • Chips = electrons • Cookie = 1 big proton electrons proton PS.3 Atomic Model: The student will understand the historical & modern model of the atomic structure

12. Rutherford Model • 1911 • Solid positive nucleus w/ majority of mass surrounded by electrons PS.3 Atomic Model: The student will understand the historical & modern model of the atomic structure

13. Bohr Model • 1913 • Electrons in fixed orbits around nucleus • Nucleus made of positive protons & neutral neutrons PS.3 Atomic Model: The student will understand the historical & modern model of the atomic structure

14. Electron Cloud • Current Model • Nucleus made up of protons & neutrons • Electrons are not in fixed orbits • Are frequently in certain areas PS.3 Atomic Model: The student will understand the historical & modern model of the atomic structure