Why does the electronegativity get smaller as you move from an element with a lower atomic number to an element with a higher atomic number within a group but larger when you move from an element with a lower atomic number to a higher atomic number within a period?

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

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

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?