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प्रश्न
What are orbits or shells of an atom?
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उत्तर
The circular orbits (shell present) in the space available around the nucleus on which electrons revolve are called orbits or shells of an atom.
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संबंधित प्रश्न
The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
What is meant by the 'atomic number of an element'?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with 6 valence electrons
State the main postulates of Dalton’s atomic theory.
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Oxygen – \[\ce{^16_8O}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
If an isotope of ‘H’ has mass no. = 2, how many electrons does it have.
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
If an isotope of ‘H’ has mass no. = 3, how many neutrons does it have.
Differentiate between the following term:
Atomic number and mass number
What is common salt? Name the elements present in it. Write the formula of common salt. What are the atomic number and the mass number of the elements? Write the ions in the compound.
Name the 3 sub-atomic particles of an atom.
