Using only the information available in the periodic table, consider the elements calcium and chlorine. From their location on the periodic table, identify the oxidation state and number of valence electrons for calcium and chlorine. Which statement most
accurately describes the compound formed by calcium and chlorine?

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