Advertisements
Advertisements
प्रश्न
What is meant by Unified Atomic Mass?
Advertisements
उत्तर
- During earlier times, one way to determine an atom's mass directly was to evaluate its relative mass. However, relative mass is no longer recognized after creating a unified mass.
- Unified atomic mass is the unit of atomic mass called Dalton.
- Its symbol is ‘u’. 1u = 1.66053904 x 10-27 kg.
APPEARS IN
संबंधित प्रश्न
An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.
Define gram atomic mass of a substance. How much is the gram atomic mass of oxygen ?
What is meant by saying that 'the atomic mass of oxygen is 16' ?
Define the following form:
Atomic mass number
Define atomic mass unit.
The relative atomic mass of Cl atom is 35.5 a.m.u. Explain this statement.
Select the correct answer from the answer in the bracket to complete the sentence.
An element has electronic configuration 2, 8, 1 and 12 neutrons. Its mass no. is ________.
Give a reason for the following:
The mass number of an atom is slightly less than the actual atomic mass.
Draw the structure of oxygen and sulphur atoms.
The sum of the numbers of protons and neutrons of an atom is called its ______
The gram atomic mass of an element has no unit.
Answer the following question using the data given below:
- Assertion: The Relative Atomic mass of aluminium is 27
- Reason: An atom of aluminium is 27 times heavier than 1/12th of the mass of the C – 12 atom.
Calculate the % of oxygen in Al2(SO4)3. (Atomic mass: Al-27, O-16, S -32)
Calculate the % relative abundance of B-10 and B-11, if its average atomic mass is 10.804 amu.
Chlorine exists in two isotopic forms, \[\ce{Cl-37}\] and \[\ce{Cl-35}\] but its atomic mass is 35.5. This indicates the ratio of \[\ce{Cl-37}\] and \[\ce{Cl-35}\] is approximately
An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom?
Atoms are so tiny their mass number cannot be expressed in grams but expressed in ______.
The ratio of masses of H and O in H2O is ______.
