Final answer:
The weight of elements on the periodic table is determined by their atomic mass. This can be found by looking up the atomic mass of the element on the periodic table.
Step-by-step explanation:
The weight of elements on the periodic table is given by their atomic mass. The atomic mass of an element is the weighted average of the masses of all the isotopes of that element, taking into account their natural abundance. It is usually expressed in atomic mass units (amu) or grams per mole (g/mol).
For example, the atomic mass of carbon is 12.011 amu. This means that on average, a carbon atom weighs 12.011 atomic mass units.
To find the weight of an element on the periodic table, you can look up the atomic mass of that element. Most periodic tables include the atomic mass of each element listed below the element's symbol.
Learn more about Atomic mass and periodic table