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Pre - AP Chemistry

Subjects : pre-ap, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A physical change of a substance from one state to another






2. The smallest unit of an element that maintains the properties of that element






3. Number of waves that pass a given point in a specific time - usually one second.






4. A testable statement






5. A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.






6. Two quantities that have a constant mathematical product






7. Two quantities that give a constant value when one is divided by the other






8. The 14 elements with the atomic numbers 90-103.






9. A 3D region around the nucleus that indicates the probable location of an electron.






10. Orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron - and all electrons in singly occupied orbitals must have the same spin state.


11. A substance that reacts in a chemical change






12. An explanation of how phenomena occur and how data or events are related






13. A reaction in which one or more substances are converted into different substances






14. State in which an atom has a higher potential energy than it has in it's ground state.






15. The state of matter in which the substance has definite volume and definite shape






16. The 14 elements with the atomic numbers 58-71.






17. Any digit in a measurement that is known with certainty plus one final digit - which is somewhat uncertain or is estimated






18. Describes mathematically the wave properties of electrons and other very small particles.






19. A high-temperature physical state of matter in which atoms lose their electrons






20. No two electrons in the same atom can have the same set of four quantum numbers






21. Not having a uniform composition throughout






22. The state of matter in which the substance has a definite volume but an indefinite shape






23. The total number of protons and neutrons in the nucleus of an isotope






24. The smallest unit of an element that maintains the properties of that element






25. A negative ion.






26. An arrangement of the elements in order of their atomic numbers so that the elements with similar properties fall in the same column or group.






27. A property that does not depend on the amount of matter present






28. An outer main energy level occupied - in most cases - by 8 electrons






29. The p-block elements together with the s-block elements.






30. If two or more different compounds arecomposed of the same two elements - then the ratio of the masses of the secondelement combined with a certain mass of the first element is always a ratio ofsmall whole numbers






31. Distance between corresponding points on adjacent waves.






32. A measure of the gravitational pull on matter






33. The mass of one mole of a pure substance






34. A measure of the amount of matter






35. Any process that results in the formation of an ion.






36. The elements of group 17 of the periodic table.






37. A short-range proton-neutron - proton-proton - or neutrorce that holds the nuclear particles together






38. An element that has some characteristics of metals and some characteristics of nonmetals






39. The energy required to remove one electron from a neutral atom of an element.






40. Narrow beam of the emitted light was shined through a prism - it was separated into four specific colors of the visible spectrum.






41. A pure substance made of only one kind of atom






42. A substance that is formed by a chemical change






43. The elements of group 2 of the periodic table.






44. A unit of mass that is exactly 1/12 the mass of a carbon-12atom - or 1.660 540 × 10-27 kg






45. Particle of electromagnetic radiation having zero mass and carrying a quantum of energy.






46. The closeness of a set of measurements of the same quantity made in the same way






47. A chemical compound contains the same elementsin exactly the same proportions by mass regardless of the size of the sample orthe source of the compound






48. The amount of space occupied by an object






49. A ratio derived from the equality between two different units that can be used to convert from one unit to the other






50. A value calculated by subtracting the experimental value from the accepted value - dividing the difference by the accepted value - and then multiplying by 100