The noun quantum is a singularnoun. The plural form is quanta.
A possessive noun requires the use of an apostrophe.
The singular possessive form is quantum's. The plural possessive form is quanta's.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The plural possessive form of "mass" is "masses'".
The noun quantum is the singular form; the plural is quanta.
The plural form of "quantum" is "quanta."
The plural form of the noun light is lights.The plural possessive form is lights'.
The plural is runners-up. The plural possessive is runners-up's.
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
I would have to answer all three, depending upon which context the term is meant to be conveyed.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The plural is relatives. The plural possessive is relatives'.
The plural is lads. The plural possessive is lads'.
The ladie's club is not a correct possessive form.The noun ladies is the plural noun.The possessive form of the plural noun is ladies'.The correct plural possessive form is the ladies' club.The noun lady is the singular noun.The correct singular possessive form is a lady's club(a golf club intended for a female).
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is echoes. The plural possessive is echoes'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is stepsisters. The plural possessive is stepsisters'.
The plural form is inches. The plural possessive is inches'.