Two properties of metallic elements are:
a. malleable and insoluble in water.
b. flexible and a high melting point.
c. brittle and a good conductor of heat and electricity
d. insoluble in water and does not conduct electricity
c is the best answer. Some, but not all of the statements in a b and d are true but in c both statements are true.
The two correct properties of metallic elements are:
b. flexible and a high melting point.
c. brittle and a good conductor of heat and electricity
To determine which answer is correct, let's examine each option:
a. malleable and insoluble in water: Malleability refers to the ability of a substance to be hammered or rolled into thin sheets without breaking. Insolubility in water means that the substance does not dissolve in water. While metallic elements are usually malleable, they are generally soluble in water, so this option is not correct.
b. flexible and a high melting point: Metallic elements are not typically flexible but rather possess high tensile strength, making them less prone to bending or breaking. However, they do have high melting points, which means they require a significant amount of heat to change from a solid to a liquid state. Therefore, this option is partially correct.
c. brittle and a good conductor of heat and electricity: Brittle materials are prone to breaking or shattering when subjected to stress. Metallic elements are not generally considered brittle. However, they are indeed exceptional conductors of heat and electricity. Thus, this option is also not correct.
d. insoluble in water and does not conduct electricity: This option is incorrect as well. Metallic elements are usually soluble in water and excellent conductors of electricity.
Based on our analysis, option b, which states that metallic elements are flexible and have a high melting point, is the most accurate choice.