Advertisements
Advertisements
प्रश्न
Explain the rule according to which electrons are filled in various energy levels.
उत्तर
- The maximum capacity of a shell to accommodate electrons is given by the general formula 2n2, where n is the serial number of a shell.
- The maximum number of electrons possible in the outermost shell is 8 and that in the penultimate shell is 18.
- It is not necessary for an orbit to be completed before another is formed. In fact, a new orbit is formed when the outermost shell attains 8 electrons.
APPEARS IN
संबंधित प्रश्न
Name the subatomic particle whose relative charge is : –1
Fill in the blank of the following statement :
Cathode rays are a beam of fast moving _________.
What is an electron? State its relative mass and charge.
What are cathode rays? How are these rays formed?
An atom X has three electrons more than the noble gas configuration. What type of ion will it form?
The electronic configuration of fluoride ion is the same as that of the neon atom. What is the difference between the two?
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?
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]
When an atom gains an electron it has more electrons and thus it carries a positive charge.
