Hydrogen and Helium
The element with the smallest atomic mass is hydrogen, which has an atomic mass of approximately 1.008 atomic mass units. Its atomic number is 1, indicating that it has one proton in its nucleus. Hydrogen is the simplest and most abundant element in the universe.
No two elements may have the same atomic number. But two elements may have same atomic mass. Hence atomic number is better than atomic mass.
By Atomic Mass
Gold is a meta element. Atomic Mass of it is 197.
Atomic Mass.
The element with the smallest atomic mass is hydrogen, which has an atomic mass of approximately 1.008 atomic mass units. Its atomic number is 1, indicating that it has one proton in its nucleus. Hydrogen is the simplest and most abundant element in the universe.
Generally the term "atomic mass" is used for isotopes. For elements is preferred now "atomic weight".
Hydrogen.
Hydrogen
Hydrogen.
Hydrogen
No two elements may have the same atomic number. But two elements may have same atomic mass. Hence atomic number is better than atomic mass.
By Atomic Mass
The molar mass of a compound is the sum of atomic weights of the contained elements in the molecule.The expression atomic weight is correct for elements; for isotopes is correct atomic mass.
On the periodic table, the elements are arranged by Atomic Mass. Helium and Hydrgen are at the way top of the table due to how they have the smallest amount of mass. The elements with the biggest mass are at the bottom.
Gold is a meta element. Atomic Mass of it is 197.
Atomic Mass.