Test your basic knowledge |

MCAT Chemistry

Subjects : mcat, 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 structural formula in which electrons are represented by dots; dot pairs or dashes between two atomic symbols represent pairs in covalent bonds.






2. The tendency for an atom to attract electrons to itself when it is chemically combined with another element






3. A fundamental constant - h - that relates the energy of light quanta to their frequency: h = 6.6 X 10^-34 joule

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


4. A substance that - when dissolved in water - results in a solution that can conduct electricity






5. The molar solubility of one salt is reduced when another salt - having a common ion is brought into the same solution






6. A chemical bond in which one atom loses an electron to form a positive ion and the other atom gains to electron to form a negative ion






7. A chemical bond that involves sharing a pair of electrons between atoms in a molecule






8. (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance C>>>>A+B






9. A physical property of a solution that depends on the number - but not the identity - of the disswolved solute particles; example properties include vapor pressure lowering - boiling point elevation - osmotic pressure - and frezzing point depression






10. Sum of the protons and neutrons in an element often denoted by the letter A






11. Side - to side parallel orbitals overlap to share electrons - the 2nd/3rd covalent bond between two atoms - cannot rotate and maintain the bond.






12. 1913 - Niels Bohr - said that electrons formed specific layers instead or random ones - said atoms atoms absorb and give off energy when the electrons move from one shell to another






13. An element in an 'A' group in the periodic table; as a group these elements display a wide range of physical and chemical properties. In their atoms - the s and p sublevels in the highest occupied energy level are partially filled






14. Sum of all the masses - in AMU - present in one molecule of a molecular compound.






15. The lowest allowable energy state of an atom






16. Second quantum number - designated by the letter 'l.' This 'angular momentum' refers to the subshells within each principle quantum energy level. It can take on the value of an integer in the 0 to (n -1) range. The four subshellscorresponding to l=0






17. The amount of a substance that contains as many particles as there are atoms in exactly 12g of carbon -12






18. Theory stating that the rate of a reaction is directly proportional to the number of collisions that take place between reactants per second.






19. (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance






20. Set of spectral lines appearing in the UV region when a hydrogen atom undergoes a transition from energy levels n>1 to n=1.






21. (chemistry) a substance that changes color to indicate the presence of some ion or substance






22. A representation of a displacement reaction showing only the reactive species and omitting the spectator ions.






23. The formation of one or more covalent bonds between an electron pair donor and an electron pair acceptor






24. Defined acids as subtsances that produced H ions in water - while bases produced OH ions. When they reacted together - H and OH neutralise to make water






25. Simplest whole # ration of atoms in a compound






26. The maximum amount of product that can be produced from a given amount of reactant






27. Have three valance electrons. In certain instances - some elements will loose three electrons - but they will also share electrons with another element to attain stability.






28. Alkaline Earth Metals - 2 valence electrons +2 ions - Magnesium Mg






29. Property of the elements that can be predicted from the arrangement of the periodic table






30. (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight






31. The ratio of the number of moles of solute dissolved in one kilogram of solvent. molality (M = moles solute/kg of solution)






32. Solids in which the particles are arranged in a repeating - 3- D pattern - has a specific melting point - classified as ionic network covalent - metallic or molecular.






33. The process by which a gas escapes from one container to another at lower pressure through a tiny hole in the container.






34. Attractive and repulsive forces between molecules that are weaker than forces within molecules.






35. E=hc/?






36. Chalcogens - - Oxide O






37. Region in a molecule where atomic orbitals overlap - resulting in either a stable low - energy bonding orbital or an unstable high - energy antibonding orbital.






38. (chemistry) a series from actinium to lawrencium of 15 radioactive elements with increasing atomic numbers






39. Two or more atoms held together by covalent bonds






40. A bond formed when two atomic orbitals combine to form a molecular orbital that is symmetrical around the axis connecting the two atomic nuclei






41. An emperimentally determined mathmatical expression showing the rate of a reaction as a function of the concentration of its reactants






42. The solubility of a gas in a liquid is directly proportional to the partial pressure of that gas on the surface of the liquid

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


43. The ways in which electrons are arranged in various orbitals around the nuclei of atoms






44. Atoms react by gaining or losing electrons so as to acquire the stable electron structure of a noble gas - usually eight valence electrons






45. The Percent by mass of each element in a compound.






46. A covalent bond in which the bonding electrons are shared equally by the bonded atoms - resulting in a balanced distribution of electrical charge






47. A set of spectral lines that appear in the visible light region when a hydrogen atom undergoes a transition from energy levels n>2 to n=2.






48. Named after their cation and anion






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






50. The percent by mass of each element in a compound