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chemical bond

Page history last edited by Anna 15 years, 11 months ago

 

Chemical Bonding:
Ionic vs. Covalent Bonding

 

Testable Question:

  • What happens to the valence electrons when there is a covalent bond?

  • What happens to the valence electrons when there is an ionic bond?

 

Procedures:

  1. Answer the questions about the comic.

  2. You will also need to use the periodic table from the book (pgs 328-329)

 

Covalent Bonding:
                        Hydrogen (H) and Chlorine (Cl)





  1. Is Hydrogen a metal or a non-metal?


nonmetal

 

  1. Is Chlorine a metal or a non-metal?


nonmetal

 

  1. How many valence electrons does Hydrogen have after they have bonded? 2

 

 

  1. How many valence electrons does Chlorine have after they have bonded? 8


 

 

  1. What happened to some of Hydrogen and Chlorine’s valence electrons when they chemically combine to make the compound Hydrochloric Acid?


they shared valence electrons.


 


 


 


 


                                Carbon (C) and Oxygen (O)                  




  1. Is Carbon a metal or a non-metal?

Carbon is a non metal.


 

 

  1. Is Oxygen a metal or a non-metal?

non metal


 

 

  1. How many valence electrons does Carbon have after they have bonded with the second Oxygen?

4


 

 

  1. How many valence electrons does each Oxygen have after they have bonded?

4


 

 

  1. What happened to some of Carbon and Oxygen’s valence electrons when they chemically combine to make the molecule Carbon Dioxide?     they get 8 valence electrons.

  2.  


 


 


 


 


 

 

Conclusion:

  • Describe what happens in a covalent bond (be specific).


 

 

 

 

Ionic Bonding:
                                    Magnesium and Oxygen

 





  1. Is magnesium a metal or a non-metal?

metal


 

 

  1. Is Oxygen a metal or a non-metal?

non metal


 

  1. How many valence electrons do they both have once they have bonded?

 

8


 

  1. What happened to the valence electrons of magnesium and oxygen when they chemically combine to make the compound Magnesium Oxide?

 

they combine and create 8 valence electrons.

 


 


 


 


 


 


 






Calcium (Ca) and Sulfur (S)

 



 

 


  1. Is Calcium a metal or a non-metal?


metal

 

  1. Is Sulfur a metal or a non-metal?


non metal

 

  1. How many valence electrons do they both have once they have bonded?

8


 

  1. What happened to the valence electrons of Calcium and Sulfur when they chemically combine to make the compound Calcium Sulfide?

they share valanced electrons and shared  their electrons together to make 8.

 


 


 


 


 


 


 


 


 

 

Conclusion:

  • Describe what happens in an ionic bond (be specific).



 

 

For each one you will need to:

  • Identify if the atoms will bond through a covalent bond or an ionic bond.

  • How many valence electrons does each atom start with?

  • How many valence electrons will each atom end up with after they combine?


The Bonding Atoms
 Covalent or Ionic Bond?
 Valence Electrons of each atom at the beginning
 Valence Electrons of each atom at the end
Sodium (Na) and Fluorine (F) Ionic Bond Na(1) F(7) Na=0 F=8
Bromine (Br) and Bromine (Br)   Br(7) Br(7) Br=6 Br=8
Phosphorous (P) and Nitrogen (N)   P(5) N(5) P=2 N=8
Beryllium (Be) and Selenium (Se)   Be(2) Se(6) Be=0 Se=8
Aluminum (Al) and Nitrogen (N)   Al(3) N(5) Al=0 N=8


 

 

 

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