1. Chapter 1: Atomic Structure and the Periodic Table
Section 1.1: Atoms are the smallest form of elements

2. All matter is made of atoms
Are all substances we touch the same?
Example: A book is made of a different _________ then air.
First it was thought everything was made of:
Air, ______, fire, and earth
Today chemists know about ____ basic substances, or _________, account for everything we see or touch.
Element is related to the word “elementary” which means “______”

3. Types of Atoms in Earth’s Crust and Living Things

4. Types of Atoms in Earth’s Crust and Living Things

5. Names and Symbols of Elements
Where do these names come from?
People, ______, and Greek words
Symbols
First Letter of Its Name
Hydrogen ___
Sulfur ___
Carbon ___
First Letter Plus One More Letter
Aluminum ____
Platinum ____
Zinc ____

6. Names and Symbols of Elements (cont.)
Some symbol names are less obvious.
Symbols from Latin Name
Gold ____
Lead ____
Iron ____
Copper ____

7. Each Element is Made of Different Atoms
Dalton was the first to propose that each ________ is made of tiny particles called ______.
Atoms are made of even smaller particles
________

8. The Atomic Model
___________
_______________
__________
________

9. The Structure of an Atom
Proton
A __________ charged particle located in an atom’s nucleus.
Neutron
A particle that has __________ charge and is located in an atom’s nucleus.
Nucleus
The central region of an atom where most of the atom’s mass is found in ________________.
**THE ___________ HAS AN OVERALL POSITIVE CHARGE**

10. The Structure of an Atom
Electron
A ___________ charged particle located outside an atom’s nucleus.
An electron is about ______ times smaller than either a proton or neutron.
**The ______________ has a negative charge**
 Neutral atoms have no electrical charge because they have the ______ number of _______ as _________.

11. Atomic Number The number of _______ in the nucleus of an atom.
This determines the ______ of an atom.
Ex. Every hydrogen atom has an _______________ of 1, it has exactly one proton in its nucleus.

12. Atomic Mass Number
The total number of _______ and ________ in an atom’s nucleus.
Atoms of a certain element always have the same number of ______, but may not always have the same number of ________.
So, not all atoms of an ________ have the same atomic mass number.
What are these atoms called????

13. Isotopes
Atoms of the same element that have a _________ number of ________.
Ex. All chlorine atoms have 17 protons. However, some chlorine atoms have 18 neutrons, while other chlorine atoms have 20 neutrons.
Some elements have many ________, while others just have a ____.

14. Atoms Form Ions
An ____ is formed when an atom ______ or ______ one or more ________.
The number of ________ in an ion is _________ from the number of ________.
An ion ____ have an overall electric charge.

15. Formation of a Positive Ion
A ______ ion is formed when an atom ______ an electron.
A positive ion is ______ than the atom that formed it because it has ______ electrons.
Positive ions are represented by the symbol for the element with a raised ____ sign to indicate a positive _______.
Ex.

16. Formation of a Negative Ion
A _______ ion is formed when an atom ______ an electron.
A negative ion is ______ than the atom that formed it because it has _____ electrons.
Negative ions are represented by the symbol for the element with a raised _____ sign to indicate a ________ charge.
Ex.