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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
Name the subatomic particle whose relative charge is : –1
The atom of an element X has 7 electrons in its M shell.
What type of ion will be formed by an atom of element X? Write the symbol of the ion formed.
What could element X be?
Give the symbol and charge of each particle.
What are inert elements?
Element X has electronic configurations 2, 8, 18, 8, 1. Without identifying X,
- Predict the sign and charge on a simple ion of X.
- Write if X will be an oxidizing agent or a reducing agent. Why?
Write down the electronic configuration of the following
- 2713X,
- 3517Y.
Write down the number of electrons in X and neutrons in Y and the formula of the compound formed by X and Y.[XY3]
Cathode rays are made up of
The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element?
In a television tube, Cathode rays are deflected by magnetic fields.
An atom has a number of orbits and each orbit has protons.
