the formula for carbon dioxide is CO 2. It has one carbon atom (relative atomic mass = 12.0) and two oxygen atoms (relative atomic mass = 16.0): M r of CO 2 = 12.0 + 16.0 + 16.0 = 44.0 It could ...

work out how many atoms of each element are in the chemical formula add together the A r values for all the atoms of each element ...

F = ma One of the most fundamental equations in physics, Newton’s Second Law of Motion, was formulated by Sir Isaac Newton in ...

was less than the atomic mass (average mass of the atom). For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. Since electrons have almost no mass ...