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प्रश्न
What are the two main features of Rutherford’s atomic model?
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उत्तर
According to Rutherford’s model an atom consists of:
- The centrally located nucleus: The nucleus is a centrally located positively charged mass. The entire mass of the atom is concentrated in it. It is the densest part of the atom. Its size is very small as compare to the atom as a whole.
- The outer circular orbits: Electrons revolve in circular orbits (shell) in the space available around the nucleus. An atom is electrically neutral i.e., number of protons and electrons present in an atom are equal.
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संबंधित प्रश्न
What are the atomic numbers of elements whose outermost electrons is represented by 3s1.
FILL IN THE BLANK
Atomic theory of matter was given by ..........................
WRITE SHORT ANSWER
Define the atomic mass number of an atom.
Fill in the blank of the following statement :
The total number of protons and neutrons in the nucleus of an atom is called its _________.
The mass number of an element is 23 and it contains 11 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
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Isotopes of hydrogen [11H, 21H, 31H]
The particles that make up the atom are called ______ particles.
Explain the following terms.
- Proton
- Electron
- Neutron.
What is the relation between mass number & atomic number?
