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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 number of protons in the nucleus of each atom of an element






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






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






4. 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






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






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






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






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






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






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






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






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






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






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






15. A vertical column of the periodic table






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






17. 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






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






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






20. 1/2 the distance between the nuclei of identical atoms that are bonded together.






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






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






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






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






25. 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






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






27. The arrangement of electrons in an atom






28. Not having a uniform composition throughout






29. Something that has magnitude - size - or amount






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






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






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






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






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






35. The p-block elements together with the s-block elements.






36. A positive ion.






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






38. Two quantities that have a constant mathematical product






39. Lowest energy state of an atom.






40. A horizontal row of elements in the periodic table






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






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






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






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






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






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






47. The mass of one mole of a pure substance






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






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






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