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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 14 elements with the atomic numbers 90-103.






2. 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






3. A measure of the amount of matter






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






5. A horizontal row of elements in the periodic table






6. 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






7. A high-temperature physical state of matter in which atoms lose their electrons






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






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






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






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






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






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






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






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






16. A testable statement






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






18. A substance that is made from the atoms of two or more elements that are chemically bonded






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






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






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






22. 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






23. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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






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






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






27. Anything that has mass and takes up space






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 element that is a poor conductor of heat and electricity






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






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






32. Two quantities that have a constant mathematical product






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






34. A vertical column of the periodic table






35. Not having a uniform composition throughout






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






37. 1/2 the distance between the nuclei of identical atoms that are bonded together.






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






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






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






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






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






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






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






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






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






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






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






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






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