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Answer:
Explanation:
1) A metalloid is an element that has properties that are intermediate between those of metals and nonmetals. Metalloids can also be called semimetals. On the periodic table, the elements colored yellow, which generally border the stair-step line, are considered to be metalloids. Notice that aluminium borders the line, but it is considered to be a metal since all of its properties are like those of metals.
2) Physical change because when a candle is lit the wax melts and turns into liquid state and as some of the molten wax drops on the floor or table it solidifies again.
3)Water is a pure substance because it only contains one type of molecule. Pure water contains only molecules that are a combination of one oxygen atom covalently bonded to two hydrogen atoms. A pure substance is one that is composed of only one type of atom or one type of molecule.
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Answer:
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