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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. A pure substance made of only one kind of atom






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






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






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






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






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






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






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






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






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






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






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






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






15. 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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16. A horizontal row of elements in the periodic table






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






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






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






20. Something that has magnitude - size - or amount






21. Any substance that has a definite composition






22. 6.022 1367 × 1023; the number of particles in exactly onemole of a pure substance

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23. A positive ion.






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






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






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






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






28. A vertical column of the periodic table






29. The mass of one mole of a pure substance






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






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






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






33. 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






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






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






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






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






38. Anything that has mass and takes up space






39. 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






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






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






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






43. The amount of space occupied by an object






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






45. Combination of all the forms of electromagnetic radiation.






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






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






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






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






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