Across
- 1. a measure of how close a series of measurements are to one another
- 5. the group 1A elements
- 9. subatomic particles with no charge but with a mass nearly equal to that of a proton
- 10. this is found by subtracting atomic number from mass number
- 11. each horizontal row of the periodic table
- 12. greek prefix for .5
- 17. gives the lowest whole number ratio of the elements in a compound
- 18. a change that produces matter with a different composition than the original matter
- 20. the simplest form of matter that has a unique set of properties
- 23. process that seperates a solid from the liquid in a heterogeneous mixture
- 24. greek prefix for 12
- 26. a substance that speeds up the reaction but is not used up in the reaction
- 27. a chemical change in which two or more substances react to form a single new substance
- 29. the name for Ba(oh)2
- 30. atoms that have the same number of protons but different numbers of neutrons
- 31. the name for H2SO4
- 33. all the digits that are known plus a last digit that is estimated
- 34. the basic SI unit of mass
- 36. this is found using the equation (part/whole)(100)
- 40. composed of two elements and can be either ionic or molecular
- 42. the number of representative particles in a mole
- 43. greek prefix for 9
- 45. this is found using the equation (mass(%) + mass(%)/ 100)
- 46. a substance present at the start of the reaction
- 48. property that depends on the amount of matter in a sample
- 50. an ion with a negative charge
- 51. the equation (mass of element/total mass)(100) is used to find this
- 52. the quantity 22.4 L
Down
- 2. the elements in group 8A of the periodic table
- 3. an ion with a positive charge
- 4. each side of the equation has the same number of atoms of each element and mass is conserved
- 5. the zero point on the kelvin scale
- 6. the name for HCL
- 7. a chemical equation that does not indicatethe relative amounts of the reactants and products
- 8. a weighted average mass of the atoms in a naturally occurring sample of the element
- 13. negatively charged subatomic particles
- 14. the name for NaOH
- 15. the ability of an atom of an element to attract electrons when the atom is in a compound
- 16. the smallest particle of an element that retains its identity in a chemical reaction
- 19. poor cunductors of heat and electric current
- 21. this is found using the equation (|error|/accepted value)(100)
- 22. in any physical change or chemical reaction mass is conserved
- 25. ionic compound that produces hydroxide ions when dissolved in water
- 28. the SI unit of energy
- 32. small whole numbers that are placed in front of the formulas in an equation in order to balance it
- 35. greek prefix for 1
- 36. consists of a single atom with a positive or negative charge resulting from the loss or gain of one or more valence electrons
- 37. on ion that appears on both sides of an equation and is not directly involved in the reaction
- 38. the name for HNO3
- 39. 6.02 x 10^23 representative particles of that substance and is the SI unit for measuring the amount of a substance
- 41. a compound that contains one or more hydrogen atoms and produces hydrogen ions when dissolved in water
- 44. the equation (mass/volume) is used to find this
- 47. greek prefix for 4
- 49. the mas of a mole of an element