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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. An elementary particle with 0 charge and mass about equal to a proton






2. 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






3. The pressure exerted by a vapor in equilibrium with its liquid or solid phase






4. An uncharged molecule with a single unpaitred electron in its outer ring - very unstable - exists for only about 10 seconds






5. A structural formula in which electrons are represented by dots; dot pairs or dashes between two atomic symbols represent pairs in covalent bonds.






6. Expression of auto - ionization of water into H+ and OH- at a certain temperature - given by the product of the ions' molar concentrations. Denoted by Kw and equal to 10-






7. 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.






8. Small discrete increments of energy.






9. The slowest elementary step which is the limit for the rate of the other steps






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






11. The area of chemistry that is concerned with reaction rates and reaction mechanisms






12. Large molecular structures - strong covalent bonding - share qualities of IONIC And COVALENT






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






14. One - half the distance between the nuclei of two atoms of the same element when the atoms are joined






15. The intermolecular force in which a hydrogen atom that is bonded to a highly electronegative atom is attracted to an unshared pair of electrons of an electronegative atom in a nearby molecule






16. Halogens; ns2np5 - - 2nd most reactive group - The Halogens; very active because of need to fill; form -1 ions; 7 electrons in valence shell; tend to form salts with elements from groups 1A and 2A






17. Substance in which a solute is dissolved to form a solution






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






19. Numbers that specify the properties of atomic orbitals and of their electrons






20. Resulting positive nuclear charge an outer electron senses after accounting for the shielding effect of inner core electrons. Abbreviated as Z(eff). Increases from left to right - and bottom to top on the Periodic Table.






21. 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






22. A subdivision of an energy level in an atom. They are divided into orbitals.






23. Product of the molar concentrations of dissociated ions in solution at saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted Ksp.






24. The hypothetical equation showing only the species that is oxidized or reduced in a redox reaction and the correct number of electrons transferred between the species in the complete - balanced equation.






25. Charge assigned to an atom in a molecule or polyatmic ion - calculated by (# valence electrons) - (# 1/2 bonding electrons) - (# nonbonding electrons). Molecules containing atoms with lower formal charges tend to be more stable than those with higher






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






27. Chalcogens - - Oxide O






28. 2.18 x 10^-18 J/electron






29. No two electrons or protons or neutrons in a given system can be in states characterized by the same set of quantum numbers






30. The energy required to break a chemical bond and form neutral isolated atoms






31. A naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers






32. Standard Temperature and Pressure. 273 Kelvin (0 Celsius) - 1 atmosphere (760 torr - 760 kPA).






33. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






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






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






36. Redox reaction - in which the same species is both oxidized and reduced.






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






38. The amount of energy that reactants must absorb before a chemical reaction will start; also called free energy of activation.






39. Mixture of 2 or more substances that distills at a constant temperature and with constant composition - even though seperately the components have different boiling points






40. Having characteristics of both an acid and a base and capable of reacting as either






41. A base that can accept two moles of H+ per mole of itself (ex: SO4






42. The weight in grams of compound that can be substituted by 1 atom of Hydrogen. GEW = MW / # of acidic Hyrdogens






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






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

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45. At a constant pressure - the volume of an ideal gas is directly proportinal to its temperature: V (a) T

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46. 5 different orbitals shaped like clover leaves and max electrons is 10






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






48. Play- by- play showing the individual steps of a reaction - including the formation and destruction of any reaction intermediates that may occur.






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






50. Two or more atoms held together by covalent bonds






Can you answer 50 questions in 15 minutes?



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