(a) homogeneous mixture (b) compound (c) homogeneous mixture (d) element
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(a) homogeneous mixture Air is a homogeneous mixture because it is made of many gases but is uniform and consistent throughout. (b) compound Sugar is a compound because it is made up of several elements chemically combined in defined ratios to form a new substance. (c) homogeneous mixture Cough syrup is a homogeneous mixture because its components are consistent throughout. (d) element Cadmium is an element because it cannot be broken down any further into any constituent parts that can still be identified as cadmium. On the periodic table, cadmium is element 48 with the elemental symbol Cd.