The species formed when a proton is removed from an acid is called the a. antacid. b. buffer c. conjugate acid. d. conjugate base. e. cation

d. conjugate base.

Explanation:

Conjugate base -

As , a proton is removed from an acid , it lead to the formation of a conjugate base .

For example ,

Consider an acid HA , the proton is lost from the acid in the following way -

HA >  H⁺   +    A⁻  

H⁺  is the proton lost

And ,

A⁻  is the conjugate base .

Hence , from the given option of the statement , the correct term is  d. conjugate base .

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each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.