Which statement describes the composition of potassium chlorate, kclo3?
(1) the proportion by mass of elements combined in potassium chlorate is fixed.
(2) the proportion by mass of elements combined in potassium chlorate varies.
(3) potassium chlorate is composed of four elements.
(4) potassium chlorate is composed of five elements.

Which other elements contain the same number of outer electrons as sodium

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

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5