This element rusts when there is a chemical reaction with oxygen
Iron
This element is found in pennies
Copper
The third element
Lithium
I am found in sunscreen
Zinc
I am found in cans
Tin
I am the chemical found in pools
Chlorine
The time required for any specific element, like Uranium, to shrink half to the original size
Half life
The ninth element
Fluorine
I am found in jewelry (hint: not gold)
Silver
The gas you exhale
Carbon dioxide
Atomic number 49
Indium
The emission of high energy particles or waves
Radioactivity
As well as being an element, I am the name of an American coun
Nickel
Found in pencils
Lead