Question

originally, chemical substances were named based on their origins or properties, leading to a chaotic assortment of common names. the adoption of the international union of pure and applied chemistry (iupac) system in 1919 not only provided names that reveal a substances composition but also standardized naming across the field.
the common name and iupac names for three ionic compounds are given below.
common name iupac name uses
quicklime calcium oxide building materials such as steel and plaster
limestone calcium carbonate cement production and antacid tablets
fluorite calcium fluoride optical lens production
label each image with the chemical formula for the substance indicated below.
click each dot on the image to select an answer.
quicklime
limestone
fluorite

Explanation:

Step1: Recall calcium oxide formula

Calcium has a +2 charge ($Ca^{2 + }$) and oxygen has a - 2 charge ($O^{2 - }$), so the formula is $CaO$.

Step2: Recall calcium carbonate formula

Calcium ($Ca^{2 + }$) and carbonate ion ($CO_{3}^{2 - }$) combine to form $CaCO_{3}$.

Step3: Recall calcium fluoride formula

Calcium ($Ca^{2 + }$) and fluoride ion ($F^{-}$), to balance the charges, the formula is $CaF_{2}$.

Answer:

Quicklime: $CaO$
Limestone: $CaCO_{3}$
Fluorite: $CaF_{2}$