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






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






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






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






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






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






7. 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






8. 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






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






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






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






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






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.


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






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






16. Having a uniform composition throughout






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






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






19. Combination of all the forms of electromagnetic radiation.






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






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






22. One wave per second.






23. The general term for any isotope of any element






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






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






26. A substance that is formed by a chemical change






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






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






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






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






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






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






33. The mass of one mole of a pure substance






34. A horizontal row of elements in the periodic table






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






36. The measurement system accepted worldwide


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






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






39. A vertical column of the periodic table






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






41. Two quantities that have a constant mathematical product






42. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance


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






44. Something that has magnitude - size - or amount






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






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






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






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






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






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