The word period (full stop) or the punctuation mark, has nothing directly to do with grammatical conjunctions.
The word period meaning time has everything to do with astronomical conjunctions, where celestial objects appear in the same part of the sky -- the period of revolution determines the frequency of conjunction.
The symbol used in logic for a conjunction (connective form) is not a period but a larger, centered dot.
A period is used to signal the end of a complete sentence. Correct: This is the best paper I've ever written. A period is also used at the end of an indirect question.
The word "is" is a verb (to be). It cannot be a conjunction or a preposition.
No, 'it' is a Pronoun.
interjection
No it is not a conjunction. It is a preposition (used with an object), or an adverb, or more rarely a noun. It is an interjection used in radio communication to indicate the end of a dialogue line.
Venus can never appear in superior conjunction from Earth.
Conjunction happens when two planets are on the same straight line as the Sun. At superior conjuction Venus is behind the Sun, while at inferior conjunction it is between the Earth and Sun and can sometimes be seen crossing the Sun as a small black disc. Each conjunction happens once in each synodic period of 587 days.
kind of It's a conjunction.
If is not a preposition. It is a conjunction.
"Who" is a pronoun, not a preposition or a conjunction. It is used to refer to a person or people.
"since" is not a preposition. It is a conjunction.
"around" is a preposition when used to indicate location or direction, such as "walk around the park." It is not a conjunction or interjection in this context.
"for" can function as both a preposition and a conjunction. As a preposition, it shows a relationship between a noun or pronoun and other words in a sentence. As a conjunction, it connects words, phrases, or clauses.
Of is a preposition.
"Or" is a conjunction used to connect words or groups of words within a sentence. It presents a choice between alternatives.
"Below" is not a conjunction; it is typically used as a preposition to indicate a lower position or place.
"With" is a preposition when it is used to indicate accompanying someone or something. It is a conjunction when it is used to introduce a clause or phrase that provides more information about a previous statement.
No, the word "if" is not a preposition. It is a conjunction that is used to introduce a conditional clause.
When can you use than as a preposition rather than a conjunction?
Despite is a preposition.