The mass of carbon atom is1.993x10-26kg, the mass of gold atom is kg, and the relative atomic mass of gold atom is akg1.993x10? 26kg× 1 12≈6.02× 1026 a。
The relative atomic mass of magnesium is m. If the mass of a magnesium atom is x, then x1.993x10? 26kg× 1 12=M，x≈0. 166M× 10-26kg。
A: The relative atomic mass of gold atom is 6.02×1026a; ; The mass of a magnesium atom is 0. 166m× 10-26kg.