In each of the following substances nah, h2, and h2s, hydrogen is assigned an oxidation number of +1. Is this correct? Explain your reasoning

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

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

What are the similarities between compounds and mixtures?