1 amu = `(1)/(12)` the mass of one C-12 atom .

Answer

To determine whether the statement "1 amu = (1/12) the mass of one C-12 atom" is true or false, we can follow these steps:

### Step 1: Understand the Definition of AMU
The atomic mass unit (amu) is a standard unit of mass that quantifies mass on an atomic or molecular scale. It is defined based on the mass of carbon-12 (C-12) atoms.

**Hint:** Remember that the definition of amu is based on a specific isotope of carbon.

### Step 2: Recall the Mass of Carbon-12
The mass of one carbon-12 atom is defined as exactly 12 amu. This means that if you take one C-12 atom, it weighs 12 atomic mass units.

**Hint:** Think about how the mass of carbon-12 is used to define the unit of amu.

### Step 3: Relate AMU to the Mass of C-12
According to the definition, 1 amu is equal to (1/12) of the mass of one carbon-12 atom. This can be mathematically expressed as:
\[ 1 \text{ amu} = \frac{1}{12} \times \text{mass of one C-12 atom} \]

**Hint:** Consider how fractions relate to whole numbers when defining units.

### Step 4: Conclusion
Since the definition of 1 amu is indeed (1/12) of the mass of one carbon-12 atom, we can conclude that the statement is true.

**Final Answer:** The statement "1 amu = (1/12) the mass of one C-12 atom" is **True**.

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