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






2. A substance that is formed by a chemical change






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






4. A negative ion.






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






6. Anything that has mass and takes up space






7. Specify the properties of atomic orbitals and the properties of electrons in orbitals.






8. One wave per second.






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






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






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






12. A substance that reacts in a chemical change






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






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






15. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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






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






18. Two quantities that have a constant mathematical product






19. Something that has magnitude - size - or amount






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






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






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






23. 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






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






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






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






27. Any substance that has a definite composition






28. A positive ion.






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






30. 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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31. Atoms of the same element that have different masses






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






33. Not having a uniform composition throughout






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






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






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






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






38. Which suborbital. (Py - Px - Pz)






39. 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






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






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






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






43. A horizontal row of elements in the periodic table






44. No two electrons in the same atom can have the same set of four quantum numbers






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






46. The arrangement of electrons in an atom






47. Lowest energy state of an atom.






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






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






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