Advertisements
Advertisements
प्रश्न
Explain in brief the experimental proof which led to the discovery of –
Electrons
उत्तर
Electrons: English physicist William Crookes in 1878 discovered the cathode rays
He found that when an electric discharge is passed through a tube containing a gas at low pressure (0.01 mm of Hg).
Blue rays were emitted from the negative plate [i.e. cathode]. These rays were called cathode rays and consist of negatively charged particles now called electrons. Electrons are an essential part of each and every atom.
APPEARS IN
संबंधित प्रश्न
What is the absolute mass and charge of an electron?
Write down the number of electrons in X and neutrons in Y.
An atom X has three electrons more than the noble gas configuration. What type of ion will it form?
If electrons are getting added to en element Y; then
What charge will Y migrate to during the process of electrolysis?
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.
What is the relation between the number of protons and the number of electrons in an atom?
What are the noble gases?
Cathode rays are made up of
All non–metals will have ______ electrons in the outermost orbit of their atoms.
Anode rays travel in straight lines.
