DO NOW Mon, 10/051. Open your binder to your biology

section. 2. Go to your notes from last week and write

your summary!3. On your bellringer sheet, under today’s

date, copy the first 5 roots from the list in the back of your binder.

Reminders: LAB FEE NOW! HW #5 due Fri! All made up work due tomorrow!!!

ROOM 342

• We meet in the Computer Lab TOMORROW

Intro to Chemistry

What are we made of?

• Everything is made of matter• Matter is found as elements• Elements are organized on the Periodic

Table• Elements cannot be broken down in any

simpler substances• They are made of atoms

What is an atom?

• Smallest unit of matter!

• Everything is made of atoms.

Parts of an atom

Things to remember…

• Number of p+ = number of e-

What makes atoms different?

• What makes an atom unique is the number of protons in nucleus

• We know what element the atom is if we know the # of p+ in nucleus

• How do we know the number of protons? we look on the periodic table!

How to read element info!

Element Symbol

Atomic Number (#p+)

Mass Number (#p+ + #n0)

Note: #n0 = Mass Number - Atomic number

So what does it look like?

Atom + Atom• Two or more atoms = molecule• Element + element = compound• All compounds have a formula (like a

recipe! H20, NaCl!• Mixture: not chemically combined, can

be separated (rice and corn)• Solution: chemically combined, cannot

separate physically (coffee, juice)