Warm Up: November 7, 2013

Atoms are small! Suppose I offered you one atom of gold (Au) for every second that has passed since the Big Bang.

1. How much gold would you have? 2. How much money do you think that much

gold would be worth?

• This is 1.5% of the 1 ounce coin.

• Now divide that piece of the coin into 3,000 parts and one of those 3,000 parts would be your gold.

• It would be worth about $0.21

• Average age of the universe: 14,000,000,000 (14 billion) or 1.4 x 1010 years

• This would be 4.418x1017 seconds

• And that many atoms of gold would have a mass of 0.00014458 grams.

• Today, the price of gold is $46.21 per gram.

• So you tell me what your gold atoms are worth….

Correct HW

Cool Down

• Title: PToE Brace Map

Two elements in

that group

The PToE

Homework:

• P. 137 #1a-c & #2a-c• Vocab Booklet:– Atomic Number– Average Atomic Mass– Period – Group– Isotope– Mass Number

Explain Element Cube Project