Answer:Valence electrons are the number of electrons in the outermost energy level of an atom.
Valency is the number of electrons an atom needs to gain or lose in order to have a full outermost energy level.
Explanation:
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Answer:
Argon (Ar) is smallest element in 3rd period in periodic table.
The method that can be used to separate the mixture is chromatography.
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What is chromatography?</h3>
"Chromatography" is obtained form a Greek word which literarily means, color writing. It is a method of separation which is common in separating a mixture of pigments.
To obtain the colors used, two solvents are mixed and the sample ink is dissolved in the solvents then spotted on a thin layer and put into a TLC chamber then the chromatogram is allowed to develop.
The various components of the pigment will appear on the chromatogram and can be identified using spectrophotometry. The Rf values of each component can also be used to identify it.'
Learn more about chromatography: brainly.com/question/26491567
