Back spasms can cause arm and hand pain if the spasms hinder communication between the spine and the nerves in the upper extremities. According to WebMD, pinched nerves in the upper or cervical spine often trigger pain, tingling, numbness or reduced strength in the shoulders, arms or hands. Continue Reading.
Best Answer: An atom can be any one of the elements. A molecule is a combination of atoms into a single substance. A compound is a molecule that includes atoms of two different elements. Organelles are parts of cells made up of many, many atoms, such as the mitochondria. Elements are the simpliest form of complete matter, for example a single hydrogen (H) atom.
A molecule is the smallest particle of a substance that exists independently. Molecules of most elements are made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms. Look at the model of oxygen above. The two balls represents the two oxygen molecules. The oxygen molecules are bonded or stuck together. We will learn about bonds later.