Question

The quantity equal to one mole is defined using which isotope

Answer 1

A.

Explanation:

There are several reasons that Carbon-12 was chosen as the standard for determining the relative mass of other atoms.

• Its abundance on earth
• Carbon-12 is a very stable isotope atom
• Its has the same number of neutrons and protons hence more ideal to use for a precise calculation of amu (atomic mass unit) -

The mass of an atom are based on the ¹/12 mass of Carbon-12.