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प्रश्न
What are valence electrons?
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उत्तर
Valence electrons: The number of electrons present in the valence shell is known as valence electrons.
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संबंधित प्रश्न
The ion of an element has 3 positive charges. The mass number of atom of this element is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
What are cathode rays? How are these rays formed?
Choose the correct option
The number of valence electrons in O2- is :
Explain the following:
Atoms combine by transfer and sharing of an electron(s).
The electronic configuration of nitrogen is (2, 5). How many electrons in the outer shell of a nitrogen atom are not involved in the formation of a nitrogen molecule?
What is the term defined below?
A bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.
An element X has 2 electrons in its M shell, it forms a bond with an element Y which has 7 electrons in its third orbit.
- Write the formula of the compound formed.
- Which nearest inert gas electronic configuration will element X and Y acquire.
- Show by orbital diagram the formation of the compound between X and Y.
Cathode rays are made up of
Rutherford’s ‘alpha (α) particles scattering experiment’ resulted in to discovery of
Assertion: Helium has four electrons in the outermost orbit.
Reason: Neon has eight electrons in the outermost orbit.
