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






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






3. Lowest energy state of an atom.






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






5. 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






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






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






8. Two quantities that have a constant mathematical product






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






10. The amount of space occupied by an object






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






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






13. A horizontal row of elements in the periodic table






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






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






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






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






18. Anything that has mass and takes up space






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






20. Particle of electromagnetic radiation having zero mass and carrying a quantum of energy.






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






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






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






24. A measure of the amount of matter






25. The 14 elements with the atomic numbers 58-71.






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






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






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






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






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






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






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






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






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






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






36. Combination of all the forms of electromagnetic radiation.






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






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






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






40. Not having a uniform composition throughout






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






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






43. The general term for any isotope of any element






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






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






46. Distance between corresponding points on adjacent waves.






47. 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






48. 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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49. Emission of electrons from a metal when light shines on a metal.






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