Across
- 2. chemical reaction an equation where the number of atoms of each type in the reaction is the same on both the reactant and product sides
- 4. relationship the numerical relationship between the quantities of reacting substances that corresponds to the laws of stoichiometry.
- 7. formula the chemical formula of a compound that gives the simplest ratio of elements in a compound rather than the total number of atoms in the molecule
- 9. mass the mass equivalent of Avogadro's number of atoms of an element mass per mole
- 10. scientific unit that measures the mass of a substance (has a value of 6.023 x 10 )
- 13. a compound that absorbs water molecules from its environment and includes them as part of its structure
- 14. factors a ratio (or fraction) that represents the relationship between two different units and is always equal to 1
- 15. unit the lowest whole number ratio of ions represented in an ionic compound
- 16. substance substances that are made up of only one kind of particle and have a fixed or constant structure
Down
- 1. reaction a process in which reactants react chemically and convert into products by chemical transformation
- 3. number number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.023 × 10
- 5. basic building block of chemistry; the smallest part of a substance that cannot be broken down chemically
- 6. composition tells you by mass what percent of each element is present in a compound
- 8. an atom or group of atoms in which the number of electrons is different from the number of protons
- 11. uses the relationship between reactants and products in a chemical reaction to determine quantitative data
- 12. formula a chemical formula that gives the total number of atoms of each element in each molecule of a substance