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see what had happened was that i wasn't in class for the discussion that day.

What is the name of this hydrocarbon?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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