PDF chapter test TRY NOW
1. Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.
\(_{1}\textrm{H}^{1}\) -
\(_{0}\textrm{n}^{1}\) -
\(_{-1}\textrm{e}^{1}\) -
The top number is a superscript number that indicates its .
The bottom number is the subscript number that indicates its .
2. For an atom ‘X’, K, L and M shells are completely filled. How many electrons will be present in it?
The number of electrons occupy in the K, L and M shells are given below:
K \(=\) \(2\),
L \(=\) \(8\),
M \(=\) ,
Total electrons.
Number of electrons \(=\) \(=\) atomic number \(=\) .
The element with atomic number is .
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