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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 closeness of a set of measurements of the same quantity made in the same way






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






3. A measure of the amount of matter






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






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






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






7. Atoms of the same element that have different masses






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






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






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






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






12. Something that has magnitude - size - or amount






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






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






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






16. 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






17. A measure of the gravitational pull on matter






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






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






20. 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






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






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






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






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






25. Two quantities that have a constant mathematical product






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






27. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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






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






30. Having a uniform composition throughout






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






32. The total number of protons and neutrons in the nucleus of an isotope






33. Any substance that has a definite composition






34. Any process that results in the formation of an ion.






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






36. A negative ion.






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






38. One wave per second.






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.

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






41. 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






42. The measurement system accepted worldwide

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






44. The general term for any isotope of any element






45. The physical and chemical properties of the elements are periodic functions of their atomic numbers.






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






47. An electron occupies the lowest-energy orbital that can receive it






48. The mass of one mole of a pure substance






49. A substance that reacts in a chemical change






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