Pretend an atom has:

4 protons,

5 electrons,

and 9 neutrons.

What element is it?

The 6 in this picture is called the ____.

How many protons does Carbon 14 contain?

How many neutrons does Carbon 14 contain?

Isotopes are atoms of the same element with a differing number of ____.

What do Carbon¹² and Carbon¹⁴ have in common?

Pick all that apply.

The time taken for 50% of an isotope to decay is known as the _____.

Which law states that older rock layers are buried deaper in the Earth?

Which types of rock are younger than Mudstone? Pick all that apply.

Pretend the half life of an element is 100 years. How many half-lives would 200 years represent?

Pretend the half life of an element is 100 years. How much of the original 100% would remain after 200 years?

Pretend the half life of an element is 100 years. After 300 years, how many half lives of time has passed since the fossil was alive?

Pretend the half life of an element is 100 years. Pretend the atmosphere naturally contains 600ppm of this element. If a fossil were 300 years old, much of the element would remain?

How much C14 will remain in a fossil after 17,190 years?

If a fossil is discovered to contain 10% of the normal amount of C14, how old would it be estimated?