To determine the correctness of the statement "A gram is defined as the amount of the substance which has a mass equal to the gram atomic mass of the atom," we need to evaluate the definition of a gram and how it relates to the gram atomic mass.
1. Understanding Gram:
- A gram is a unit of mass in the metric system. It is defined as one thousandth of a kilogram.
2. Understanding Gram Atomic Mass:
- The gram atomic mass of an element refers to the mass of one mole of atoms of that element, usually measured in grams. It is numerically equivalent to the atomic mass of the element expressed in atomic mass units (amu).
3. Examining the Statement:
- The statement implies that a gram is specifically defined by the mass of a substance that matches the gram atomic mass of an atom.
4. Correct Interpretation:
- While the gram atomic mass indeed relates to the mass of one mole of atoms, it is not accurate to define a gram solely by this relationship.
- A gram is a universal unit of mass that applies broadly to any substance, not just those with mass equal to the gram atomic mass of an atom.
- For instance, 1 gram of water, 1 gram of sugar, and 1 gram of salt are all measured in grams but do not necessarily relate to the gram atomic mass of their constituent molecules.
Given these points, the statement "A gram is defined as the amount of the substance which has a mass equal to the gram atomic mass of the atom" is not true. The correct answer is:
b. FALSE
