Counting Atoms (Page 2 of 2) in pdf

Counting Atoms Page 2

Have nine other students/teams do the same, adding their Cheerios consecutively.

10 groups of 100 Cheerios = 1000 Cheerios.

Measure how long a line is formed by 1000 Cheerios. = _________ meters

How many thousands of atoms thick was the aluminum foil from Part One?

(Answer in Part 1, Step 6) / 1000 = __________ thousands of atoms

How long a line would the same number of Cheerios be?

Length of 1000 Cheerios x how many 1000's of atoms

________________ x _________________

= ______________ m

= ______________ Km

HELP CLEAN UP!

For Further Investigation:

Atoms are so incredibly tiny that chemists need a special way of measuring them. Bakers sell

donuts by the dozen (12), and schools use pencils by the gross (144). Chemists count atoms by

the mole.

One mole of atoms is 6.022 x 10

atoms. Looking at the Periodic Table, the atomic mass

given for any element is equivalent to how many grams one mole of that element's atoms would

weigh. For example, carbon has an atomic mass of 12.0 g/mole (see Periodic Table!). This

means one mole of carbon atoms (6.022 x 10

atoms) would weigh 12.0 grams. How much

would one mole of the following atoms weigh?

one mole of calcium (Ca) = __________grams

one mole of gold (Au)

= __________grams

one mole of iron (Fe)

__________grams

Here are some more interesting comparisons for you to consider:

• One mole of marbles is enough to cover the entire earth to a depth of 50 miles.

• If you stacked a mole of pennies, it would reach the other side of the Milky Way Galaxy.

• A mole of dollars would provide the earth's 6 billion people with $1,000,000 each, and there

would be enough money left over to do the same for 100 million earths.

Do you think you could drink a mole of water molecules?

_________

Counting Atoms Page 2