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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 ratio of mass to volume or mass divided by volume






2. 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






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






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






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






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






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






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






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






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






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






12. Lowest energy state of an atom.






13. 1/2 the distance between the nuclei of identical atoms that are bonded together.






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






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






16. 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






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






18. A property that does not depend on the amount of matter present






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






20. A testable statement






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






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






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






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






25. The measurement system accepted worldwide


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






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






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






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






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






31. Two quantities that have a constant mathematical product






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






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






34. A horizontal row of elements in the periodic table






35. Having a uniform composition throughout






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






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






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






39. 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.


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






41. A measure of the gravitational pull on matter






42. Distance between corresponding points on adjacent waves.






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






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






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






46. A positive ion.






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






48. Any substance that has a definite composition






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






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