Counting atoms

17,034 views
16,889 views

Published on

1 Comment
2 Likes
Statistics
Notes
  • Great way of teaching myself it! Helped alot on Homework!
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total views
17,034
On SlideShare
0
From Embeds
0
Number of Embeds
11,329
Actions
Shares
0
Downloads
18
Comments
1
Likes
2
Embeds 0
No embeds

No notes for slide

Counting atoms

  1. 1. COUNTING ATOMS
  2. 2. RULES FOR COUNTING ATOMS1. SUBSCRIPTS only refer to the atom that they are BEHIND. For H2S There are TWO atoms of HYDROGEN and only ONE atom of SULFUR.
  3. 3. COEFFICIENTS2. COEFFICIENTS apply to the entire compound. You MULTIPLY the coefficients and SUBSCRIPTS. 2 H2S ATOMS OF HYDROGEN: 4 ATOMS OF SULFUR: 2 ELEMENT, ASSUME THERE IS ONLY ONE ATOM OF THAT ELEMENT!
  4. 4. PARENTHESES3. If elements or compounds are inside of PARENTHESES, then the SUBSCRIPT behind the parentheses applies to everything inside. Ba(OH)2 ATOMS OF BARIUM: 1 ATOMS OF OXYGEN: 2 ATOMS OF HYDROGEN: 2
  5. 5. MgCl2Atoms of Magnesium: 1Atoms of Chlorine: 2 Al2S3Atoms of Aluminum: 2Atoms of Sulfur: 3
  6. 6. PRACTICE H2SO4Atoms of Hydrogen: 2Atoms of Sulfur: 1Atoms of Oxygen: 4 CH3OHAtoms of Carbon: 1Atoms of Hydrogen: 4Atoms of Oxygen: 1
  7. 7. THIS COULD BE A LITTLE Ca3(PO4)2Atoms of Calcium: 3Atoms of Phosphorus: 2Atoms of Oxygen: 8 Al2(SO4)3Atoms of Aluminum: 2Atoms of Sulfur: 3Atoms of Oxygen: 12
  8. 8. What about this BAD BOY??? 2Ca3(PO4)2Atoms of Calcium: 6Atoms of Phosphorus: 4Atoms of Oxygen: 16

×