1. Express each of the following numbers in scientific notation with the correct number of SF.

What does the cell nucleus do or, how does it function?

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

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?