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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 ratio of mass to volume or mass divided by volume






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






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






4. 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






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






6. One wave per second.






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






8. No two electrons in the same atom can have the same set of four quantum numbers






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






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






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






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






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






14. Having a uniform composition throughout






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 property that does not depend on the amount of matter present






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






18. Any substance that has a definite composition






19. Anything that has mass and takes up space






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






21. 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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22. A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.






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






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






25. A testable statement






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






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






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






29. A substance that is formed by a chemical change






30. 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






31. Particle of electromagnetic radiation having zero mass and carrying a quantum of energy.






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






33. The arrangement of electrons in an atom






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






35. Two quantities that have a constant mathematical product






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






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






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






39. A negative ion.






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






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






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






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






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






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






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






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






48. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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






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







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