Advertisements
Advertisements
Question
Explain the rule according to which electrons are filled in various energy levels.
Solution
- 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
RELATED QUESTIONS
Fill in the blank of the following statement :
Cathode rays are a beam of fast moving _________.
The subatomic particle called electron was discovered by :
The atom of an element X has 7 electrons in its M shell.
Is it a metal or a non-metal?
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?
Choose the correct answer from A, B, C and D:
When a metal atom becomes an ion:
In the formation of (i) oxygen molecule (ii) carbon tetrachloride molecule, state the following:
- Electronic configuration of nearest inert gas attained.
- How many electrons are shared/transferred in bond formation
- Which type of bonds these compounds form?
- Draw their orbital diagrams.
What are the noble gases?
Cathode rays are made up of
Helium has two electrons in the outermost orbit and so it is chemically inert.
When an atom gains an electron it has more electrons and thus it carries a positive charge.
