Advertisements
Advertisements
Question
What are the postulates of Bohr’s model of an atom?
Solution
According to Neils Bohr’s model of the structure of the atom
- Electrons revolve around the nucleus in fixed paths called orbits.
- Only certain special orbits are allowed inside the atom.
- While revolving in discrete orbits the electrons do not radiate energy. They absorb energy to go to the higher level and emit energy to go to the lower level. These orbits are called energy levels which are represented as K, L, M, N or 1, 2, 3, 4
APPEARS IN
RELATED QUESTIONS
An ion with mass number 37 possesses one unit of negative charge. If the ion contains 11.1% more neutrons than the electrons, find the symbol of the ion.
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' ?
Explain the need for a reference atom for atomic mass. Give some information about two reference atoms.
Define the following form:
Atomic mass number
What are polyatomic ions? Give two examples.
Name or state the following:
Atoms of the same element differing in mass number
Ordinary chlorine gas has two isotopes \[\ce{^35_17Cl}\] and \[\ce{^37_17Cl}\] in the ratio of 3 : 1. Calculate the relative atomic mass of chlorine.
Give a reason for the following:
The mass number of an atom is slightly less than the actual atomic mass.
Which of the following has the smallest mass?
Which of the following represents 1 amu?
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)
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?
If the atomic mass unit ‘u’ were defined to be `1/5 "th"` of the mass of an atom of C-12, what would be the atomic weight of nitrogen in amu or ‘u’ in this state? Atomic weight of N on the conventional scale is 14.
