CH. 1 SEC. 2  ATOMS, BONDING & THE PERIODIC TABLE
 
 
 
Silicon has 14 electrons.  The 4 electrons that orbit the nucleus in the outermost "valence" energy level are gi...
valence electrons =  <ul><ul><ul><li>electrons farthest from nucleus </li></ul></ul></ul><ul><ul><ul><li>involved in bondi...
Electron dot diagrams way of showing # valence electrons
 
 
 
<ul><li>Much like people, most atoms don't like to live solitary existences.  </li></ul><ul><li>They need to COME TOGETHER...
chemical bond <ul><li>force that holds atoms together  </li></ul><ul><li>electrons may be transferred from one atom to ano...
 
 
 
Patterns of Valence Electrons  After the number of valence electrons reaches 8, a new period begins.
 
 
<ul><li># of protons in nucleus </li></ul><ul><ul><li>elements arranged in order of increasing atomic # </li></ul></ul>ato...
 
<ul><li>group (family)  = column (up & down) </li></ul><ul><li>period  = row </li></ul>
 
Alkali metals <ul><li>Group 1 </li></ul><ul><li>1 valence electrons </li></ul><ul><li>react with other atoms by losing val...
Noble gases <ul><li>Group 18 </li></ul><ul><li>8 valence electrons  </li></ul><ul><li>(except helium has 2) </li></ul><ul>...
NOBLE GASES
NOBLE GASES
Halogen family <ul><li>Group 17 </li></ul><ul><li>7 valence electrons </li></ul><ul><li>React with other atoms by gaining ...
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7th Grade Ch 1 Sec 2 Atoms Bonding and The Periodic Table

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

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