Daily Goals  Define Chemistry and matter & characteristics Define Chemistry and matter & characteristics Revisit and understand MASS vs. WEIGHT Revisit and understand MASS vs. WEIGHT Recall what makes up an atom and how it appears? Recall what makes up an atom and how it appears? Introduce the Periodic Table Introduce the Periodic Table Los →.... Define chemistry!.... Define chemistry! IC IC

1. Chemistry… (in your notes ) is the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; Google

And… A, Matter is anything that has mass. i. Mass is the “stuff” making up matter. ii. Volume is how much space matter / the mass occupies. iii. Weight is how gravity pulls on the mass.

Mass versus Weight Video Mass is the amount of “stuff “ or matter which makes up an object and how that object responds to a force. Weight Weight is the force of gravity working on that object, usually expressed in newtons.

Earth vs. Moon example So….because gravity’s pull is different on Earth and on the Moon, an object’s weight is different on Earth and the Moon, but the mass is the same.

2. Characteristics of Matter: A. Physical Properties – mass, volume, color, odor, shape, texture, taste, hardness, melting point, boiling point, phase (solid, liquid, gas) B. Chemical Properties – describe a substances ability to change into a new substance as a result of a chemical change Can you recognize PHYSICAL change vs. CHEMICAL change?

1. Aluminum foil is cut in half 2. Milk goes sour 3. Gasoline is ignited 4. Clay is molded into a new shape 5. Butter melts on warm toast 6. You take an antacid to settle your stomach 7. Water evaporates from the surface of the ocean 8. Rust forms on a nail left outside 9. A juice box in the freezer freezes 10. Rubbing alcohol evaporates on your hand

Aluminum foil is cut in half Milk goes sour Gasoline is ignited Clay is molded into a new shape Butter melts on warm toast You take an antacid to settle your stomach Water evaporates from the surface of the ocean Rust forms on a nail left outside A juice box in the freezer freezes Rubbing alcohol evaporates on your hand Physical Physical Physical Physical Physical Physical Chemical Chemical Chemical Chemical

1. What is the basic unit of matter? 2. Which subatomic (smaller than an atom; parts of an atom) particles are contained in the nucleus of an atom? 3. What is the overall charge of an atom? 4. What subatomic particle has a positive charge? 5. Which has a negative charge? 6. What charge does a neutron have?

A Helium Atom

Atomic number = # of protons Atomic mass = # of protons + neutrons Number of Neutrons = Mass Number – Atomic Number

Isotopes - When atoms of the same element contain different numbers of neutrons. But what is an element?...

Quests to You! Excellent effort on the extra credit and the study guides!

Periodic Table of the Elements (pg.  ? ? In book )

The Table Mendeleev designed this table back in 1869! He saw patterns in elements, relationships in groups. What is an element? A pure substance that consists of entirely one type of atom.

Why does hydrogen sit all by itself?

Observations Period Table is made up of 1. Periods (the rows) which reveal how many shell layers each atom has. 2. Groups (the columns) which reveals how many electrons are in the outer shell. The elements in the same group tend to “behave” the same chemically. Elements song

Bohr Model/Diagram

Homework: Record all definitions in the section pp 35 – 39 on a separate piece of paper in your notes. Complete Elements Chart

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