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प्रश्न
What is an electron? State its relative mass and charge.
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उत्तर
An electron (e−) is a fundamental subatomic particle with a negative elementary electric charge. Its mass is 1/1840th of that of a hydrogen atom.
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संबंधित प्रश्न
The atom of an element X has 7 electrons in its M shell.
Is it a metal or a non-metal?
The electronic configuration of fluoride ion is the same as that of the neon atom. What is the difference between the two?
An element A has 1 electron in its first shell. It combines with element B having 7 electrons in its third shell. What type of bond is formed?
Explain the following:
Atoms combine by transfer and sharing of an electron(s).
Name or state the following:
A bond formed by transfer of electron(s)
Name or state the following:
Ion formed by the gain of an electron(s)
Explain in brief the experimental proof which led to the discovery of –
Electrons
What are the noble gases?
On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole.
Helium has two electrons in the outermost orbit and so it is chemically inert.
