According to our textbook, we now have over __ billion people living on our planet

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?

The law of reflection states that the angle of reflection is equal to the angle of