To keep their bodies performing optimally, endurance athletes should be familiar with these 10 important nutrients. The first seven essential supplements are the minerals calcium, iron, magnesium, potassium, selenium, sodium and zinc. Their benefits range from keeping bones strong to minimizing fatigue. CALCIUM This may be the most important nutrient for an athlete. In a survey of more than 10,000 male and female athletes ages 7 to 50, fewer than half consumed 1,000 mg of calcium daily. [ 1 ] The recommended dietary intake ranges from 1,000 to 1,500 mg/day depending on age and gender.
To calculate the average atomic weight, each exact atomic weight is multiplied by its percent abundance (expressed as a decimal). Then, add the results together and round off to an appropriate number of significant figures. This is the solution for carbon: (12.000000) (0.9890) + (13.003355) (0.0110) = 12.011 amu.
It is the weight of 1 mole of a substance in grams. Every periodic table has the atomic mass under the name of the element. Atomic mass is determined by adding together the masses of the protons and the neutrons within a single atom of a given element. The weight of the electrons is usually not counted as it is so small that the mass is negligible, however on more detailled periodic tables the weight is sometimes included.