Counting Atoms Worksheet - Georgetown ISD



Name _____________________ Date ______ Bl ____

CLASSWORK ~ Practice Counting Atoms Worksheet

Directions for each problem

1) write down the different elements in each compound.

2) write down how many of that particular atom there are

3) how many atoms are there total in the compound.

Examples:

A) MgCl2 Mg – 1 B) 5 ZnSO4 Zn – 5

Cl – 2 3 total S – 5 30 total

O – 20

1) NaOH 2) 4 HNO3 3) MgCl2

4) 4 Li2O 5) 2 NaOH 6) Li2SO4

7) 3 H2O 8) NaC2H3O2 9) 3 Al2O3

10) NH4Cl 11) 5 ZnSO4 12) 7 C2S2

SUPER STAR CHALLENGE!

13) 2 Sr3(PO4)2 14) 4 Al(OH)3 15) Ca (C2H3O2)2

16) 4 Al2(SO3)3 17) 2 (NH4)3PO4 18) 4 Mg(OH)2

|Substance |Melting Point Temperature|Boiling Point - |

| | |Vaporization - |

| |- t - |Temperature |

| |(oC) |- t - |

| | |(oC) |

|Aluminum |659 |2,327 |

|Cobalt |1480 |2900 |

|Copper |1,083 |2,595 |

|Gold |1,063 |2,600 |

|Hydrogen |-259 |-253 |

|Lead |328 |1,750 |

|Manganese |1260 |2150 |

|Magnesium |650 |1110 |

|Mercury |-38.8 |357 |

|Molybdenum |2620 |5560 |

|Nickel |1455 |2730 |

|Nitrogen |-210 |-196 |

|Oxygen |-219 |-183 |

|Tungsten |3370 |5930 |

Using the data table of melting and vaporization points on the left, create 5 questions that will require detailed data analysis. Be challenging! Provide answer in parenthesis.

Example: What state of matter will Aluminum be in at 500 oC? (solid)

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