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

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






3. Narrow beam of the emitted light was shined through a prism - it was separated into four specific colors of the visible spectrum.






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






5. Having a uniform composition throughout






6. The state of matter in which a substance has neither definite volume nor definite shape






7. Anything that has mass and takes up space






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






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






10. Atoms of the same element that have different masses






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






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






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






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






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






16. A substance that reacts in a chemical change






17. A substance that is formed by a chemical change






18. Any substance that has a definite composition






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






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






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






22. Something that has magnitude - size - or amount






23. An arrangement of the elements in order of their atomic numbers so that the elements with similar properties fall in the same column or group.






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






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






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






27. A measure of the gravitational pull on matter






28. The amount of space occupied by an object






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






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






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






32. 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






33. 1/2 the distance between the nuclei of identical atoms that are bonded together.






34. One wave per second.






35. Distance between corresponding points on adjacent waves.






36. The mass of one mole of a pure substance






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






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






39. A testable statement






40. 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






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






42. 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






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






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






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






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






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






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






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






50. A negative ion.