7th Grade Ch 1 Sec 2 Atoms Bonding and The Periodic Table

  • 3,437 views
Uploaded on

 

More in: Education
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
3,437
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
45
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. CH. 1 SEC. 2 ATOMS, BONDING & THE PERIODIC TABLE
  • 2.  
  • 3.  
  • 4.  
  • 5. Silicon has 14 electrons. The 4 electrons that orbit the nucleus in the outermost "valence" energy level are given to, accepted from, or shared with other atoms. Silicon
  • 6. valence electrons =
        • electrons farthest from nucleus
        • involved in bonding
  • 7. Electron dot diagrams way of showing # valence electrons
  • 8.  
  • 9.  
  • 10.  
  • 11.
    • Much like people, most atoms don't like to live solitary existences.
    • They need to COME TOGETHER with other atoms to lead more stable, happier lives. 
    • This process of coming together is called chemical bonding.
  • 12. chemical bond
    • force that holds atoms together
    • electrons may be transferred from one atom to another, or they may be shared between atoms
  • 13.  
  • 14.  
  • 15.  
  • 16. Patterns of Valence Electrons After the number of valence electrons reaches 8, a new period begins.
  • 17.  
  • 18.  
  • 19.
    • # of protons in nucleus
      • elements arranged in order of increasing atomic #
    atomic number
  • 20.  
  • 21.
    • group (family) = column (up & down)
    • period = row
  • 22.  
  • 23. Alkali metals
    • Group 1
    • 1 valence electrons
    • react with other atoms by losing valence electron
  • 24. Noble gases
    • Group 18
    • 8 valence electrons
    • (except helium has 2)
    • don’t react very easily with other atoms
  • 25. NOBLE GASES
  • 26. NOBLE GASES
  • 27. Halogen family
    • Group 17
    • 7 valence electrons
    • React with other atoms by gaining 1 electron