1. OBJECTIVE
□ SWBAT: Describe the parts of an atom and explain why chemistry is important in understanding biology

2. CATALYST
1. Imagine your body was chopped up into many pieces and put into a blender to separate all the elements. (WEIRD!) Guess which 4 elements you would find the most of? ? ? ? ?

3. CATALYST Which 4 elements are the most common in the human body?
Use the graph below to answer the following questions
CATALYST
Which 4 elements are the most common in the human body?
b. Which 2 elements compose a little over 25% of the body?
c. Why do you think there is a lot of oxygen and hydrogen in the human body?

4. Section 6.1 Summary – pages 141-151
Carbon (C), Hydrogen (H), Oxygen (O), & Nitrogen (N) make up over 96% of the mass of a human body!!!
PIE CHART
Section 6.1 Summary – pages

5. What are living things made up of?
What are cells made up of?
What are cell parts made up of?
What are chemicals made up of?

6. Section 6.1 Summary – pages 141-151
Elements
EVERYTHING…
whether it is a rock, frog, flower, or the air – is made of substances called elements.
Guess how many elements have been discovered?
117
(a few are manmade)
Section 6.1 Summary – pages

7. Everything (all living and nonliving things) are made of elements.
An element is a substance that cannot be broken down into simpler chemical substances.
What are elements made of?
Atoms

8. More Notes! Atoms Parts of an Atom --make up elements
--basic building blocks of all matter
Atoms
Protons (p+)
Neutrons (n0)
Electrons (e-)
Parts of an Atom

9. SUBATOMIC PARTICLE CHARGE LOCATION IN THE ATOM PROTON POSITIVE
In the NUCLEUS
NEUTRON
No CHARGE
ELECTRON
NEGATIVE
In the energy levels

10. Structure of an Atom Nucleus (protons and neutrons)
Electron energy levels (electrons)

11. Insert into Cornell Notes:
Parts of an atom
Nucleus and surrounding space
Positively charged protons (+)
And neutrons with no charge
What is the nucleus made of?
What makes an element
an element?
The number of protons in the nucleus

12. # electrons = # protons;
Net Charge = 0
# electrons = # protons;

13. Atomic number: Mass number: the number of protons in the nucleus
the total number of particles in the nucleus
(protons + neutrons)

14. The Periodic Table: A Key to the Elements
State of
Matter
Element
Atomic #
Symbol
Atomic Mass
Hydrogen 1 H
1.008
P + N

15. Periodic Table Atoms Atoms Protons Neutrons Electrons Nucleus
1. The ______________   _____________ shows all known elements in the universe. 
2. All elements are made of __________________. 
3. _______________ are the smallest particle of an element that retains its chemical properties. 
4. Atoms are made of tiny subatomic particles called ______________, _______________, and
_______________. 
5. Protons and neutrons are in the _____________ of an atom. 
Atoms
Atoms
Protons Neutrons
Electrons
Nucleus

16. positive neutral negative atomic number protons molecules Hydrogen
6. Protons have a ________________ electrical charge. 
7. Neutrons have a ________________ electrical charge. 
8. Electrons have a ________________ charge that attracts them to protons. 
9. Atoms on the periodic table are organized by________________, which is really the number of ______________  
10. Different types of atoms can bond together to make ________________. 
11. Water is 2 atoms of ______________and 1 atom of ____________. 
neutral
negative
atomic number
protons
molecules
Hydrogen
Oxygen

17. Mass number or Atomic Mass:
Atomic number:
Mass number or Atomic Mass:
the number of protons in the nucleus
the total number of particles in the nucleus
(protons + neutrons)

18. RECALL The Periodic Table: A Key to the Elements
State of
Matter
Element
Atomic #
Symbol
Atomic Mass or Mass Number
Hydrogen 1 H
1.008
P + N

19. Sulfur 16 S 32.06 16 16 S 16 P + N = Atomic Mass 32.06 16
Use the information about Sulfur from the periodic table to answer the following questions:
What is the atomic number?
What is the Chemical Symbol
How many electrons does Sulfur have?
What is the atomic mass?
How many neutrons does Sulfur have?
Sulfur 16 S
32.06 16 16 S 16
P + N = Atomic Mass
32.06 16

20. Covalent Bonding (Water - H20)

21. Compounds and Bonding
A compound is a substance that is composed of atoms of two or more different elements.
Example:
Table salt is NaCl
(Sodium + Chlorine)