Respuesta :
The metalloid in period 3 with more protons than sodium and fewer valence electrons than chlorine will be Si (silicon).
What is metalloid?
Metalloids were chemical elements that have physical as well as chemical properties that stand among metal but also nonmetal.
What is valence electrons?
The count of electrons that occupy in the outermost orbital of a particular atom referred as valence electrons.
Therefore, the metalloid in period 3 with more protons than sodium and fewer valence electrons than chlorine will be Si (silicon).
To know more about metalloid and valence electrons.
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