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Question
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
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Solution
This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
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Multiple Choice Questions
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The electrons revolving in shells close to the nucleus are called ................... electrons.
Draw the electronic configuration of the following elements clearly stating the number of neutrons and protons in their nucleus.
a. Beryllium b. Silicon
c. Chlorine d. Aluminium
e. Nitrogen
Name the negatively charged particle present in the atoms of all the elements.
The particle not present in an ordinary hydrogen atom is :
State its one drawback of Rutherford’s atomic model.
If an atom ‘A’ has an atomic number of eleven, state the number of protons and electrons it contains.
What is meant by the term subatomic particles?
