Question

Which number on the Periodic Table tells you how much 1 mole of an element weighs?

A. Atomic number
B. Atomic mass
C. Group number
D. Proton number

Answer 1

The atomic mass on the Periodic Table indicates the weight of 1 mole of an element, expressed in atomic mass units (amu); when presented in grams, it corresponds to the weight of 1 mole of the element.

Step-by-step explanation:

The number on the Periodic Table that tells you how much 1 mole of an element weighs is the atomic mass. The atomic mass is a weighted average of the masses of all the natural isotopes of the particular element and is usually noted as a number located under the symbol of the element. When this atomic mass is expressed in grams, it represents the mass of 1 mole of that element. For example, the atomic mass of carbon is 12 atomic mass units (amu), and thus 1 mole of carbon weighs 12 grams.