हिंदी

What are the postulates of Bohr’s model of an atom? - Science

Advertisements
Advertisements

प्रश्न

What are the postulates of Bohr’s model of an atom?

संक्षेप में उत्तर

उत्तर

According to Neils Bohr’s model of the structure of the atom

  1. Electrons revolve around the nucleus in fixed paths called orbits.
  2. Only certain special orbits are allowed inside the atom.
  3. 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
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Structure of the Atom - Long Answer Questions [पृष्ठ ३२]

APPEARS IN

एनसीईआरटी एक्झांप्लर Science [English] Class 9
अध्याय 4 Structure of the Atom
Long Answer Questions | Q 41. | पृष्ठ ३२

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

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.


An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.


An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.


Define gram atomic mass of a substance. How much is the gram atomic mass of oxygen ?


Define atomic mass of an element.


Explain the need for a reference atom for atomic mass. Give some information about two reference atoms.


Define the following form:

Atomic mass number


Choose the correct answer from the option given below.

Modern atomic symbols are based on the method proposed by


Name or state the following:

Atoms of the same element differing in mass number


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 ________.


Which of the following has the smallest mass?


The average atomic mass of hydrogen is ______ amu.


The gram atomic mass of an element has no unit.


Write the different types of isotopes of oxygen and their percentage abundance.


Calculate the % relative abundance of B-10 and B-11, if its average atomic mass is 10.804 amu.


One electron is present in the outermost shell of the atom of an element X. What would be the nature and value of charge on the ion formed if this electron is removed from the outermost shell?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×