Your SlideShare is downloading. ×
0
7th Grade Chapter 4 Lesson 2
7th Grade Chapter 4 Lesson 2
7th Grade Chapter 4 Lesson 2
7th Grade Chapter 4 Lesson 2
7th Grade Chapter 4 Lesson 2
7th Grade Chapter 4 Lesson 2
7th Grade Chapter 4 Lesson 2
7th Grade Chapter 4 Lesson 2
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

7th Grade Chapter 4 Lesson 2

586

Published on

For Student Use Only

For Student Use Only

Published in: Technology, Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
586
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. 7 TH GRADE CHAPTER 4 LESSON 2 Pgs. 134-140 For Student Use Only
  • 2. CHEMICAL CHARACTERISTICS <ul><li>Chemical Properties: </li></ul><ul><ul><li>The properties that describe how a substance changes while it is being converted into something else </li></ul></ul><ul><ul><li>Chemical Change: When two or more substances unit or break apart chemically </li></ul></ul><ul><ul><ul><li>After a chemical change the properties of the new substance are different from the original properties </li></ul></ul></ul>
  • 3. CHEMICAL CHARACTERISTICS <ul><li>Microscopic Matter: </li></ul><ul><ul><li>Element= simplest type of substance </li></ul></ul><ul><ul><ul><li>All elements are made of atoms </li></ul></ul></ul><ul><ul><li>Atoms= smallest particles of matter </li></ul></ul><ul><ul><ul><li>An element cannot be broken down into anything smaller than one particular kind of atom </li></ul></ul></ul><ul><ul><li>Compound= a new substance formed from the chemical union of two or more elements </li></ul></ul>
  • 4. CHEMICAL CHARACTERISTICS <ul><li>Matter: </li></ul><ul><ul><li>Compounds differ from each by the ratio of atoms </li></ul></ul><ul><ul><ul><li>Examples: </li></ul></ul></ul><ul><ul><ul><ul><li>H 2 O </li></ul></ul></ul></ul><ul><ul><ul><ul><li>H 2 O 2 </li></ul></ul></ul></ul><ul><ul><li>Chemical Formula: </li></ul></ul><ul><ul><ul><li>The written way to show compounds </li></ul></ul></ul><ul><ul><li>Chemical Reaction: </li></ul></ul><ul><ul><ul><li>The process of forming a chemical bond </li></ul></ul></ul>
  • 5. CHEMICAL CHARACTERISTICS <ul><li>Petite Particles: </li></ul><ul><ul><li>Atoms were thought to be the smallest particles for a long time </li></ul></ul><ul><ul><li>Atoms are made up of particles: </li></ul></ul><ul><ul><ul><li>In the Nucleus: </li></ul></ul></ul><ul><ul><ul><ul><li>Protons= positively charged particles </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Nuetrons= no charge or neutral </li></ul></ul></ul></ul><ul><ul><ul><li>Atomic Number= number of protons in the nucleus </li></ul></ul></ul><ul><ul><ul><li>Electrons= outside nucleus and have a negative charge </li></ul></ul></ul><ul><ul><li>Size must be written in Scientific Notation (Get rid of zeros) </li></ul></ul><ul><ul><ul><li>Atomic Mass= number of protons and neutrons together, always written as a whole number </li></ul></ul></ul>
  • 6. CHEMICAL CHARACTERISTICS <ul><li>The Atom: </li></ul><ul><ul><li>Electrons orbit in shells </li></ul></ul><ul><ul><ul><li>1 st shell= 2 electrons </li></ul></ul></ul><ul><ul><ul><li>2 nd shell= 8 electrons </li></ul></ul></ul><ul><ul><ul><li>3 rd shell= 18 electrons </li></ul></ul></ul><ul><ul><ul><li>4 th shell= 32 electrons </li></ul></ul></ul><ul><ul><li>A stable atom: </li></ul></ul><ul><ul><ul><li>Equal number of protons and electrons </li></ul></ul></ul><ul><ul><ul><li>Has no charge </li></ul></ul></ul>
  • 7. CHEMICAL CHARACTERISTICS <ul><li>Atom Classification: </li></ul><ul><ul><li>Molecule: When 2 or more atoms are chemically united </li></ul></ul><ul><ul><ul><li>Can be different atoms </li></ul></ul></ul><ul><ul><ul><li>Can also be same atoms </li></ul></ul></ul><ul><ul><li>Chemical Symbols: </li></ul></ul><ul><ul><ul><li>Each element has a symbol </li></ul></ul></ul><ul><ul><ul><li>Symbols have one, two, or sometimes three letters </li></ul></ul></ul><ul><ul><ul><li>Elements are arranged by atomic number and symbol in the periodic table of elements </li></ul></ul></ul><ul><li>Periodic Table of Elements: </li></ul><ul><ul><li>Designed by Dmitri Ivanovich Mendeleev </li></ul></ul>
  • 8. CHEMICAL CHARACTERISTICS

×