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7. Binary molecular compounds are made of two __________. *
7. Binary molecular compounds are made of two __________. *a. metalloid elements
b. metallic elements
c. nonmetallic elements
d. polyatomic ions
8. Which of the following correctly shows a prefix used in naming a binary molecular compound along with its corresponding number? *
a. penta-, 6
b. hexa-, 4
c. deca-, 8
d. nona-, 9
Answer:For 7: The correct answer is c.For 8: The correct answer is d.Explanation:For 7:Binary molecular compoundsare defined as the compounds formed from the combination of only two elements. Examples are:etc..These compounds are formed when two non-metal elements combine together.The first element contains partial positive charge and second element contains partial negative charge.Hence, the correct option is c.For 8:For the naming of binary molecular compounds, we use the prefixto indicate how many of each element is present in the compound.For 1' we use 'mono', for '2' we use 'di', for '3' we use 'tri', for '4' we use 'tetra', for '5' we use 'penta', for '6' we use 'hexa', for '7' we use 'septa', for '8' we use 'octa', for9 we use 'nona'and for '10' we use 'deca'.Hence, the correct option is d....