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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 measurement system accepted worldwide


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






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






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






5. Lowest energy state of an atom.






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






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






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






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






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






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






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






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






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






15. A testable statement






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






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






18. The general term for any isotope of any element






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






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






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






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






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






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






25. A horizontal row of elements in the periodic table






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






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






28. The total number of protons and neutrons in the nucleus of an isotope






29. 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.


30. Atoms of the same element that have different masses






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






32. Two quantities that have a constant mathematical product






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






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






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






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






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






38. The ratio of mass to volume or mass divided by volume






39. The mass of one mole of a pure substance






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






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






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






43. Any substance that has a definite composition






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






45. The arrangement of electrons in an atom






46. 1/2 the distance between the nuclei of identical atoms that are bonded together.






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






48. The elements of group 17 of the periodic table.






49. Something that has magnitude - size - or amount






50. 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