report the elements half life. if we start with 100g of your element (platinum) how long will it take to have 6.26g?

What diagram shows the ionic compound of magnesium oxide

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?