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F. Ba. F. Chemical Formula. Chemical formula : A representation of which elements are present and how many in a chemical compound BaF 2. # of atoms present for the preceding element. *** Don’t need to write the 1’s. Compound drawn out!!. Counting Atoms. Count. Formula.

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chemical formula

F

Ba

F

Chemical Formula

Chemical formula: A representation of which elements are present and how many in a chemical compound

BaF2

# of atoms present for the preceding element

*** Don’t need to write the 1’s

Compound drawn out!!

counting atoms
Counting Atoms

Count

Formula

Draw them out

____ Mg ____ Cl

____ H ____ O

____ P ____ O

____ C ____ H ____ O

____ N ____ H ____ O

  • MgCl2
  • H2O2
  • P2O8
  • C6H12O6
  • NH4NO3
how many atoms
How many atoms?
  • CaCl2
  • Fe(OH)3
  • NH4NO3
  • Ba3(PO4)2

___ Ca ___ Cl

___ Fe ___ O ___ H

___ N ___ H ___ O

___ Ba ___ P ____ O

slide5

O

O

Bond

O2

2O

VS

O

O

slide6

O

O

H

H

O

O

H

H

H

H

2

H2O

2OH

VS