An electrically balanced atom has 30 protons in its nucleus and 2 electrons in its outermost shell. The materials made of such atom is

An electrically balanced atom has 30 protons in its nucleus and 2 elec

1.	An electrically balanced atom has 30 protons in its nucleus and 2 electrons in its outermost shell. The materials made of such atom is
A.	a conductor
B.	an insulator
C.	a semiconductor
D.	a superconductor
Answer» B. an insulator

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An electrically balanced atom has 30 protons in its nucleus and 2 electrons in its outermost shell. The materials made of such atom is

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