Answer:
An atom is the basic building block of matter. Anything that has a mass-- in other words, anything that occupies space--is composed of atoms.
D there is one kind of cell of which all living things are made
The answer is d because in both sides there are 1 magnesiums 1 oxygens 2 lithiums and 2 chlorines
I just took a test with this question and got the answer wrong for saying ethane. The correct answer is propane.
