Advertisements
Advertisements
प्रश्न
What is meant by Unified Atomic Mass?
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
Define the atomic mass unit.
A 0.24 g sample of compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight.
Define gram atomic mass of a substance. How much is the gram atomic mass of oxygen ?
What is meant by atomic mass number?
A hydrocarbon contains 4.8g of carbon per gram of hydrogen. Calculate the gram atom of each.
What would be the reason for an element to have atoms with different mass numbers?
Select the correct answer from the answer in the bracket to complete the sentence.
An atom with electronic configuration 2, 7 and mass number 19 will have ________ neutrons.
Draw the structure of oxygen and sulphur atoms.
Which of the following has the smallest mass?
The sum of the numbers of protons and neutrons of an atom is called its ______
Relative atomic mass is otherwise known as ______.
The average atomic mass of hydrogen is ______ amu.
The gram atomic mass of an element has no unit.
Calculate the % of oxygen in Al2(SO4)3. (Atomic mass: Al-27, O-16, S -32)
What are the postulates of Bohr’s model of an atom?
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
Atoms are so tiny their mass number cannot be expressed in grams but expressed in ______.
