(a)
Interpretation: The classification of the following elements as metals or nonmetals is to be done.
Mg, Ti, Au, Bi, Si, Ge, B, At, Rn, Eu, Am, and Br
Concept introduction: The periodic table is composed of different types of elements, such as metals, nonmetals and metalloids. The elements that readily lose their valence electrons and obtain a positive charge are described as metals. The chemical properties are the outcome of how metals remove their electrons rapidly to form positively charged cations. They have a distinctive metallic lustre, are good conductors of electrity as well as heat.
On the other side, nonmetals are the elements that accept electrons in their valence shell and obtain a negative charge. They are not good conductors of electrity as well as heat.
(b)
Interpretation: An explanation regarding the elements called metalloids which show intermediate properties between metals and nonmetals is to be stated. The elements in the periodic table which are expected to be metalloid are to be identified.
Concept introduction:
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Chemical Principles
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