Question

Potassium is a metal. Which property would you expect it to have?

O A. It is a bad conductor of electricity.
O B. It has little or no shine.
O C. It is a gas at room temperature.
D.ski has a high melting point.
SUB

Answer 1

Potassium, being a metal, is typically shiny, well-conducting of electricity, malleable, ductile, with a relatively low melting point, which is not represented by any of the options provided in the question. None of the given choices accurately describe the properties of potassium. It should be noted that potassium is not a gas at room temperature, does not have a high melting point, and is not typically dull or a poor conductor of electricity.

Step-by-step explanation:

Expected Properties of Potassium.Potassium, being a metal, would exhibit the typical properties of metallic elements. Therefore, you would expect it to conduct electricity well, which contradicts the option A that it is a bad conductor of electricity. Being a metal also means that it is not a gas at room temperature, thus option C is incorrect. While potassium, specifically, is soft and has a metallic luster, it does not have a high melting point relative to other metals, so option D is incorrect. Metals are usually shiny when freshly cut or polished, dismissing option B. Among the listed options, none accurately describes the typical properties of potassium, which is usually a shiny, soft solid that conducts electricity well and has relatively low melting point for a metal. Therefore, if the question is about predicting potassium's properties, neither of the options provided is correct. Potassium is known to be soft and highly reactive with a relatively low melting point compared to many other metals. It also has a shiny luster when fresh.

Regarding the additional examples provided in the question for substances A, B, C, and D and their properties, let's identify each type:

• Substance A is malleable, ductile, conducts electricity, and has a melting point of 1135 ℃, which are properties of a metallic solid.
• Substance B is brittle, conducts electricity when molten, and has a high melting point, which are characteristics of an ionic solid.
• Substance C is very hard, does not conduct electricity, and has a very high melting point, indicative of a covalent network solid.
• Substance D is soft, does not conduct electricity, and has a low melting point, suggesting it is a molecular solid.