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






2. A substance that has a fixed composition and differs from a mixture in that every sample of a given pure substance has exactly the same characteristic properties and composition






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






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






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






6. An electron occupies the lowest-energy orbital that can receive it






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






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






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






10. A change in which one or more substances are converted into different substances






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






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






13. The Group 18 elements (helium - neon - argon - krypton - xenon - and radon)






14. A specific portion of matter in a given region of space that has been selected for study during an experiment or observation






15. A physical change of a substance from one state to another






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






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






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






19. 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






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






21. The ratio of mass to volume or mass divided by volume






22. A characteristic that can be observed or measured without changing the identity of the substance






23. The closeness of measurements to the correct or accepted value of the quantity measured






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






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






26. A measure of the gravitational pull on matter






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






28. One wave per second.






29. A broad generalization that explains a body of facts or phenomena






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






31. An element that is a poor conductor of heat and electricity






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






33. The mass of one mole of a pure substance






34. Anything that has mass and takes up space






35. The arrangement of electrons in an atom






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






37. A measure of the amount of matter






38. A substance that reacts in a chemical change






39. Not having a uniform composition throughout






40. Which suborbital. (Py - Px - Pz)






41. Any substance that has a definite composition






42. A substance that is formed by a chemical change






43. The physical and chemical properties of the elements are periodic functions of their atomic numbers.






44. A unit that is a combination of SI base units






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






46. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance


47. An element that is a good conductor of heat and electricity






48. A property that depends on the amount of matter that is present






49. Minimum quantity of energy that can be lost or gained by an atom.






50. 1/2 the distance between the nuclei of identical atoms that are bonded together.