Chapter 2

Chapter 2 - CHAPTER 2 Atoms, Molecules, and Life What Are...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Atoms, Molecules, Atoms, Molecules, and Life and Life CHAPTER 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What Are Atoms?
Background image of page 2
The basic structural unit of matter i.e., the smallest pieces of stuff ATOM: + + o o - - Protons Neutrons (no charge) Electrons (neg’ve charge) Fig. 2-1(b) He
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ATOMIC MODELS Hydrogen (H) Hydrogen (H) Helium (He) Helium (He) Nucleus Nucleus Electron Electron Shell Shell
Background image of page 4
DIFFERENT ELEMENTS HAVE DIFFERENT # OF PROTONS ELEMENT: 1. Defined by number of protons = atomic number 2. Has specific physical & chemical properties 3. Can’t be broken down by chemical reactions + + + o - - Fig. 2-1 Hydrogen (H) = 1 Helium (He) = 2 o
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Octet Rule For Electron Shells Electrons fill the shell closest to the nucleus & then begin to occupy the next shell 1 st electron shell: 2 electrons 2 nd electron shell: 8 electrons 3 rd electron shell: 8 electrons
Background image of page 6
How Do Atoms Interact to Form Molecules?
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
A molecule consists of 2 or more atoms. A compound is a molecule composed of a mixture of different atoms. Definitions:
Background image of page 8
Hydrogen Reactive outer shell partially filled Helium Inert outer shell filled It’s All About the Outer Shell Electrons
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Bonding Involves Electrons 1. One pair electrons per bond 2. Outer electrons form bonds 3. Behave using “octet rule 4.
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 29

Chapter 2 - CHAPTER 2 Atoms, Molecules, and Life What Are...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online