Which of the following is the symbol of the unit of atomic mass?
u
The correct answer is option 4 i.e. u.
The symbol “u” stands for atomic mass unit (amu) or unified mass unit, which is the standard unit used to express atomic and molecular masses. One atomic mass unit is defined as 1/12th the mass of one carbon-12 atom, and it is approximately equal to 1.66 × 10⁻²⁷ kg.
Other Options Explained:
-
mg (milligram): A unit of mass in the metric system; too large for atomic measurements.
-
g (gram): Also too large to measure atomic-scale masses.
-
ml (millilitre): A unit of volume, not mass.
Similar Questions
- What is the atomicity of Phosphorus?
Important Questions from Atomic Structure
Which of the following pairs of 'number – composition' is correct?
I. Atomic number – number of protons
II. Mass number – Sum of number of neutrons and protons
What is the atomic number of Bohrium which is named after physicist Niels Bohr, one of the founders of quantum theory?
The quantum numbers n and l for four electrons are given below.
(i) n = 4, I = 1
(ii) n = 4, l = 0
(iii) n = 3, l = 2
(iv) n = 3, l = 1
The order of their energy from lowest to highest is:
The de-Broglie wavelength of a particle of mass 0.001 kg and moving with velocity 100 m/s is given by:
What is the increasing order for the values of e/m for
