Question

Which of the following is an elements
A. air b.iron c.salt d.sugar

Answer 1

Answer:

air

Explanation:

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Answer 2

Answer:

Iron is the answer.

Explanation:

   A. Air

Included in the mixture because it consists of various elements and compounds such as H₂, N₂ and O₂. Air is a homogeneous mixture

   B. Iron  (Fe)

Included in the elements in the periodic system lies in the transition group VIIIB (block d) in period 4 with atomic number 26 and atomic mass 56. Iron is included in the metal

   C. Salt  (NaCl)

Included in the compound, because it is composed of Na and Cl elements to form NaCl compounds. This compound is included in a strong electrolyte which is fully ionized when dissolved in water so that it can conduct electricity

   D. Sugar

Included in carbohydrate compounds and is an organic compound, which is composed of 3 main elements namely C, H and O.

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