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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 substance that is formed by a chemical change






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






3. A horizontal row of elements in the periodic table






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






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






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






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






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






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






10. A vertical column of the periodic table






11. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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12. The amount of space occupied by an object






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






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






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






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






17. Something that has magnitude - size - or amount






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






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






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






22. A positive ion.






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






24. Combination of all the forms of electromagnetic radiation.






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






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






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






28. 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.






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






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






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






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






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






34. A 3D region around the nucleus that indicates the probable location of an electron.






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






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






37. The measurement system accepted worldwide

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38. 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






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






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






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






42. 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






43. A negative ion.






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






45. A testable statement






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






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






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






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






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