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






2. A substance that is formed by a chemical change






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






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






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






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






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






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






9. A measure of the gravitational pull on matter






10. A horizontal row of elements in the periodic table






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






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






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






14. Atoms of the same element that have different masses






15. 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






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






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






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






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






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






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






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






23. Not having a uniform composition throughout






24. Lowest energy state of an atom.






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






26. The d-block elements are metals with typical metallic properties.






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






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






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






30. The mass of one mole of a pure substance






31. A negative ion.






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






33. Two quantities that have a constant mathematical product






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






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






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






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






38. 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






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






40. A vertical column of the periodic table






41. Anything that has mass and takes up space






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






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






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






46. One wave per second.






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






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






49. The state of matter in which the substance has a definite volume but an indefinite shape






50. 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