COMPOUNDS
Fe2O3 is the major component in rust. How many atoms are in one molecule of rust?
5
Pure water is a(n) _____.
compound
law of definite proportions
the principle that a compound always contains exactly the same elements in exactly the same proportions by mass
molecule
the smallest unit into which a compound can be divided and still be that same compound
From what class(es) of elements is the following compound made? nitrogen dioxide
two nonmetals
compound
two or more elements that have chemically combined
binary compound
a compound made up of two elements
subscript
a lowered number in a chemical formula which indicates how many atoms of the element preceding it are in the compound
Which of the following is the best name for N2O?
dinitrogen monoxide
Which part of an atom is actively exchanged or shared in a chemical bond?
electron
Pure gold is a(n) _____.
element
The formula for table salt is NaCl. According to the law of definite proportions, this means that the formula for table salt _____.
is always NaCl
Which of the following would be the best name for MgCl2?
magnesium chloride
From what class(es) of elements is the following compound made? copper I chloride
metal and nonmetal
The smallest unit into which a compound can be divided and still be that same compound is a(n) .
molecule