Across
- 3. an ionic compound that produces hydroxide ions when dissolved in water
- 4. compound that contains one or more hydrogen atoms and produces hydrogen ions (H+) when dissolved in water
- 5. formula basic ratio that gives the lowest whole-number ratio of the atoms of the elements in a compound
- 7. of definite proportions samples of any chemical compound, the masses of the elements are always in the same proportions
- 9. particle the smallest unit into which a substance can be broken down without a change in composition, usually atoms, molecules, or ions
- 12. the amount of a substance that contains 6.02 × 1023 representative particles of that substance
- 13. equation a representation of a chemical reaction; the formulas of the reactants re connected by an arrow with the formulas of the products
- 14. mass mass of a mole of an element
- 15. of multiple proportions the different masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers
- 16. reaction a chemical change in which an element or a compound reacts with oxygen, often producing energy in the form of heat and light
- 17. reaction a chemical change in which a single compound breaks down into two or more simpler products
- 21. replacement reaction a chemical change in which one element replaces a second element in a compound
- 22. equation a chemical equation that does not indicate the relative amounts of the reactants and products
- 24. reaction a chemical change in which two or more substances react to form a single new substance; also called a synthesis reaction
- 27. composition the percent by mass of each element in a compound
- 28. series a list of elements in order of decreasing activity; the activity series of halogens is Fl, Cl, Br, I
Down
- 1. replacement reaction a chemical change involving an exchange of positive ions between two compounds
- 2. a chemical equation in which mass is conserved; each side of the equation has the same number of atoms of each element
- 6. ions a tightly bound group of atoms that behaves as a unit and has a positive or negative charge
- 8. ionic compounds an equation for a reaction in solution that shows only those particles that are directly involved in the chemical change
- 10. ion an equation for a reaction in solution that shows only those particles that are directly involved in the chemical change
- 11. volume the volume occupied by 1 mole of a gas at standard temperature and pressure
- 13. a substance that speeds up the reaction but is not used up in the reaction
- 18. a small whole number that appears in front of a formula in a balanced chemical equation
- 19. ions consist of a single atom with a positive or negative charge resulting from the loss or gain of one or more valence electrons, respectively
- 20. the conditions under which the volume of a gas is usually measured; standard temperature is 0°C, and standard pressure is 101.3 kPa, or 1 atmosphere (atm)
- 23. ionic equation an equation that shows dissolved ionic compounds as dissociated free ions
- 25. number The number of representative particles in a mole, 6.02 × 1023
- 26. compound composed of two elements and can be either ionic or molecular