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






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






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






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






5. The emission of a continuous range of frequencies of electromagnetic radiation.






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






7. The state of matter in which a substance has neither definite volume nor definite shape






8. The number of protons in the nucleus of each atom of an element






9. An atom or group of bonded atoms that has a positive or negative charge.






10. 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.






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






12. Emission of electrons from a metal when light shines on a metal.






13. Any substance that has a definite composition






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






15. 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






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






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






18. A testable statement






19. Having a uniform composition throughout






20. The weighted average of the atomic masses of thenaturally occurring isotopes of an element






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






22. Two quantities that have a constant mathematical product






23. A negative ion.






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






25. The electrons available to be lost - gained - or shared in the formation of chemical compounds.






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






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






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






29. The suborbitals of an atom. (S - P - D - F)






30. One wave per second.






31. The ability of a substance to undergo a change that transforms it into a different substance






32. A blend of two or more kinds of matter - each of which retains its own identity and properties






33. Which way it spins. (up or down)






34. The energy change that occurs when an electron is acquired by a neutral atom.






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






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






37. The amount of a substance that contains as many particles as there areatoms in exactly 12 g of carbon-12






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






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






40. The arrangement of electrons in an atom






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






42. 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






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






44. 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






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






46. 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.

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






48. Lowest energy state of an atom.






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






50. States that it is impossible to determine simultaneously both the position and velocity of an electron or any other particle.