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






2. A measure of the gravitational pull on matter






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






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






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






6. Mass is neither created nor destroyed duringordinary chemical or physical reactions






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






8. The measurement system accepted worldwide

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9. A substance that reacts in a chemical change






10. 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






11. Any substance that has a definite composition






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






13. A substance that is formed by a chemical change






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






15. The mass of one mole of a pure substance






16. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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






18. The arrangement of electrons in an atom






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






20. Not having a uniform composition throughout






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






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






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






24. Two quantities that have a constant mathematical product






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






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






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






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






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






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






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






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






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






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






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






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






37. A substance that is made from the atoms of two or more elements that are chemically bonded






38. One wave per second.






39. The elements of group 1 of the periodic table.






40. Numbers written in the form M ×10 number greater than or equal to 1 but less than 10 and n is a whole number






41. Combination of all the forms of electromagnetic radiation.






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






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






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






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






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






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






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






49. Specify the properties of atomic orbitals and the properties of electrons in orbitals.






50. The study of the composition - structure - and properties of matter and the changes it undergoes