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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 arrangement of electrons in an atom






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






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






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






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






6. 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






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






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






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






10. A testable statement






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






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






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






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






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






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






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






18. Combination of all the forms of electromagnetic radiation.






19. Anything that has mass and takes up space






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






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






22. An explanation of how phenomena occur and how data or events are related






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






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






25. A horizontal row of elements in the periodic table






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






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






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






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






30. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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






32. One wave per second.






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






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






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






36. A measure of the gravitational pull on matter






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






38. The amount of space occupied by an object






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






40. Atoms of the same element that have different masses






41. The general term for any isotope of any element






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






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






44. 1/2 the distance between the nuclei of identical atoms that are bonded together.






45. 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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46. A pure substance made of only one kind of atom






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






48. Any substance that has a definite composition






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






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