Concept explainers
(a)
Interpretation: The element in the second row of the periodic table that is a halogen, an alkali metal, an alkaline earth metal and a noble gas is to be stated.
Concept introduction: The elements in the periodic table are divided into three classes; metals, metalloids and nonmetals. The elements should be a good conductor of heat and electricity and be ductile and malleable; these are the conditions for the elements to be metals. The elements that are more like nonmetals but under certain conditions, some of the elements can be made to conduct electricity are considered to be metalloids. The elements which are poor conductor of heat and electricity are said to be nonmetals.
To determine: A halogen element in the second row of the periodic table.
(b)
To determine: An alkali metal in the second row of the periodic table.
(c)
To determine: An alkali earth metal in the second row of the periodic table.
(d)
To determine: A noble gas in the second row of the periodic table.
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