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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. Rare earth element group (elements 58-71)






2. Sol - a chemical process in which solvent molecules and molecules or ions of the solute combine to form a compound






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






4. In a solution - the substance that dissolves in the solvent






5. Process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated






6. The quantum number that has only two possible values - +1/2 and -1/2 - which indicate the two fundamental spin states of an electron in an orbital






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






8. The vapor pressure of solution is the product of the mole fraction of the solvent and the vapor pressure of the pure solvent. P_a=X_aP_total

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9. Product of the molar concentrations of dissociated ions in solution at any point in the reaction other than equilibrium or saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted IP.






10. The energy required to remove an electron from a gaseous atom; generally increases in moving from left - to - right across a period and decreases in moving down a group






11. States that if a stress is applied to a system at equilibrium - the system shifts in the direction that relieves the stress.






12. Specifies the specific orbital in which the electron is most likely to be found. - Third quantum number - designated as ml. Describes a particular orbital within a subshell where an electron is very likely to be found. Possible values are integers in






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






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






15. Gram equivalent weight of solute per liter of solution - often denoted by N.






16. A model of acids and bases which an acid is hydrogen ion donor and base is a hydrogen ion acceptor.






17. 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






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






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






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






21. 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






22. A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation - reduction reaction.






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






24. 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






25. 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.






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






27. Contains nonmetals - 7 valence electrons in it's outermost energy level. Very reactive






28. An equilibrium expression used to measure weak - acid strength - given by the ratio of the product of the products' molar concentrations to the product of the reactants' molar concentrations - with each term raised to the power of its stoichiometric






29. 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.






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

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31. Small discrete increments of energy.






32. A dynamic condition in which two opposing changes occur at equal rates in a closed system






33. Common definition of acids as proton (H+) donors and bases as proton acceptors






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






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






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






37. A pair of equal and opposite electric charges or magnetic poles separated by a small distance






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






39. 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.






40. An atom - ion - or molecule that donates an electron pair to form a covalent bond.






41. 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.






42. 5 valence electrons -3 ions - Nitride N






43. Two or more atoms held together by covalent bonds






44. (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule






45. An atom - radical - or molecule that has gained or lost one or more electrons and has a negative or positive charge






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






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






48. A measured amount of a solution of unknown concentration is added to a known volume of a second solution until the reaction between them is just complete






49. Tells you how much solute is present compared to the amount of solvent






50. A solid made up of particles that are not arranged in a regular pattern.






Can you answer 50 questions in 15 minutes?



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