COMPOUNDS

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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


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