Answer:
The Physical Properties of Chlorine are as follows:
Color: Greenish-yellow.
Phase: Gas.
Odor: Disagreeable, suffocating smell.
Density: About two and one-half times as dense as air.
Solubility: Is soluble in water. ...
Boiling Point: The boiling point of chlorine is –34.05°C.
Melting Point: The melting point is –101°C.
Explanation:
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The answer is c)11 because copper has 11 valence electrons
Natural sources include decomposition,ocean release and respiration.
Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal,oil and natural gas.
Flood plains are desirable farm land in spite of the fact that they are prone to flooding because of its high fertility.
<h3>Why are floodplains desirable farm land?</h3>
Floodplains are very fertile agricultural areas because the floods carry nutrient-rich silt and sediment and deposited it that plains. Floodplains are flat which make easier farming.
So we can conclude that flood plains are desirable farm land because of its high fertility.
Learn more about floodplain here: brainly.com/question/1000851
