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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. Something that has magnitude - size - or amount






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






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






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






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






6. 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






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






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






9. Two quantities that have a constant mathematical product






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. Having a uniform composition throughout






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






13. Not having a uniform composition throughout






14. The total amount of energy level an atom has.






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






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






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






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






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






20. The measurement system accepted worldwide

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






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






23. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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






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






26. 1/2 the distance between the nuclei of identical atoms that are bonded together.






27. The d-block elements are metals with typical metallic properties.






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






29. 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






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






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






32. Any substance that has a definite composition






33. A measure of the amount of matter






34. Distance between corresponding points on adjacent waves.






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






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






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






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






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






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






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






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






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






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






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






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






47. The mass of one mole of a pure substance






48. 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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49. A substance that is formed by a chemical change






50. A negative ion.