B) C) metalloids noble D) gases None of the E) above Explanation: Metals are the most conductive elements because of they easily lose valence electrons. The second best would be the metalloids, with non-metals and noble gases having little ability to conduct electricity. 18) All the elements of a family in the periodic table have what feature in common? They all have similar chemical A) properties. They all have the same number of protons B) in the nucleus. They are all located in the same horizontal C) row or period. They all have the same number of electrons in D) the electron cloud. None of the E) above Explanation: Elements of any family in the periodic table have the same number of valence electrons. Because of this they all have similar chemical properties. 19) The majority of elements found in the periodic table can be classified as A)
B) C) metalloids D) noble gases E) None of the above Explanation: Metals are the most conductive elements because of they easily lose valence electrons. The second best would be the metalloids, with non-metals and noble gases having little ability to conduct electricity. 18) All the elements of a family in the periodic table have what feature in common? A) They all have similar chemical properties. B) They all have the same number of protons in the nucleus. C) They are all located in the same horizontal row or period. D) They all have the same number of electrons in the electron cloud. E) None of the above Explanation: Elements of any family in the periodic table have the same number of valence electrons. Because of this they all have similar chemical properties. 19) The majority of elements found in the periodic table can be classified as A)
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