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






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






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






4. One wave per second.






5. The general term for any isotope of any element






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






7. A change in a substance that does not involve a change in the identity of the substance






8. A measure of the amount of matter






9. A form of energy that exhibits wavelike behavior as it travels through space (3.00x108 m/s)






10. 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






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






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






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






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






15. 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






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






17. A measure of the gravitational pull on matter






18. Any substance that has a definite composition






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






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






21. The measurement system accepted worldwide

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






23. 1/2 the distance between the nuclei of identical atoms that are bonded together.






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






25. A horizontal row of elements in the periodic table






26. Lowest energy state of an atom.






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






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






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






30. A substance that is formed by a chemical change






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






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






33. Combination of all the forms of electromagnetic radiation.






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






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






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






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






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






39. A testable statement






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






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






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






43. Not having a uniform composition throughout






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






45. 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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46. The emission of a continuous range of frequencies of electromagnetic radiation.






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






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






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






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