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






2. Atoms of the same element that have different masses






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






4. Not having a uniform composition throughout






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






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






7. A negative ion.






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






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






10. A measure of the gravitational pull on matter






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






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






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






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






15. 1/2 the distance between the nuclei of identical atoms that are bonded together.






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






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






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






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






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






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






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






23. One wave per second.






24. A positive ion.






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






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






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






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






29. A substance that is formed by a chemical change






30. 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.


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






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






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






34. A substance that reacts in a chemical change






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






36. Combination of all the forms of electromagnetic radiation.






37. The arrangement of electrons in an atom






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






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






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






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






42. A horizontal row of elements in the periodic table






43. 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.






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






45. 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






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






47. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance


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






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






50. 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