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






2. The Group 18 elements (helium - neon - argon - krypton - xenon - and radon)






3. A measure of the amount of matter






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






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






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






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






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






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






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






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






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






13. 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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14. 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






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






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






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






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






19. Combination of all the forms of electromagnetic radiation.






20. Distance between corresponding points on adjacent waves.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






37. A negative ion.






38. A substance that reacts in a chemical change






39. A vertical column of the periodic table






40. The measurement system accepted worldwide

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41. A logical approach to solving problems by observing and collecting data - formulating hypotheses - testing hypotheses - and formulating theories that are supported by data






42. Any substance that has a definite composition






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 ratio of mass to volume or mass divided by volume






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






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






47. A positive ion.






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






49. Something that has magnitude - size - or amount






50. A horizontal row of elements in the periodic table