Question

The unit of atomic mass, amu is replaced by u, here u stands for:

• A. Unified mass
• B. United mass
• C. Unique mass
• D. Universal mass

Hint:

The unified atomic mass unit (u) is equivalent to one twelfth of the mass of a carbon-12 atom and is used to measure atomic and molecular masses.

Answer 1

The Correct Option is A

Step 1: Understanding Atomic Mass Unit.
The unit of atomic mass (amu) is now replaced by 'u', which stands for unified mass. The unified atomic mass unit (u) is defined as one twelfth of the mass of a carbon-12 atom.

Step 2: Analyzing the options.
(A) Unified mass: Correct. This is the standard unit used now to measure atomic mass.
(B) United mass: Incorrect. There is no such term used in atomic mass measurements.
(C) Unique mass: Incorrect. This term is not used in the context of atomic mass.
(D) Universal mass: Incorrect. This is not the correct terminology.

Step 3: Conclusion.
The correct term for 'u' is Unified mass, corresponding to option (A).