Considering that silicon is a metalloid, which of the following statements is true? a. silicon's ability to conduct electric current does not vary with temperature. b. silicon does not conduct electric current under any conditions. c. silicon is a better conductor of electric current than silver is. d. silicon is a better conductor of electric current than sulfur is

Option (D) is the correct answer.

Explanation:

Metalloids are the substances that show properties of both metals and non-metals.

When it is considered that silicon is a metalloid then it means it also hows properties of both metals and non-metals. Therefore, like metals silicon is able to conduct electric current.

Whereas sulfur is a non-metal and it is known that non-metals do not conduct electric current.

Therefore, we can conclude that the statement silicon is a better conductor of electric current than sulfur is true.

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substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.