Isotopes Formative Date:
ame
A sample of element X contains 90 percent 35x
atoms, 8.0 percent "x atoms, and 2.0 percent 38x
atoms. The average isotopic mass is closest to
A. 32
B. 35
C. 37
D. 38

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Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils