There are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: nucleus'
Add an apostrophe s ('s) after the existing s at the end of the word: nucleus's
Note: If you are a student, use the form that is preferred by your teacher.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The singular possessive form for the noun clock is clock's.
"Nucleus" is a singular noun. The plural form is "nuclei".
The possessive form for the singular noun speed is speed's.Example: This device will measure your speed's velocity.
Nucleus.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The singular possessive form of "test" is "test's".
The singular possessive pronouns are "my," "mine," "your," "yours," "his," "her," and "its."
The singular possessive of "ant" is "ant's" and the plural possessive is "ants'".
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The singular possessive form of "classmate" is "classmate's."
The singular possessive of dish is dish's
Taco's is the singular possessive.
The singular possessive is Martin's.
The singular possessive is fish's.
Grave's is the singular possessive.
Buzz's is the singular possessive.