DAT General Chemistry Questions & Answers

DAT General Chemistry Questions & Answers 1ug = xmg 1mg = xg - CORRECT ANSWER - 0.001mg 0.001g Absorption Spectrum - CORRECT ANSWER - Characteristic energy bands where electrons absorb energy Angular Momentum - CORRECT ANSWER - mvr = nh/2pi m: mass of electron v: velocity of electron r: radius of electron orbit h: Planck's constant (6.626 x 10^-34 m^2kg/s) n: quantum number (integer value) Arrhenius Acids and Bases - CORRECT ANSWER - An acid is a species that produces a H+ (a proton) in an aqueous solution, and a base is a specie that produces an OH- (hydroxide ion). Atomic Radius - CORRECT ANSWER - The distance from the center of the nucleus to the boundary of the surrounding cloud of electrons. Decreases as you move up/right the periodic table. Atomic Weight - CORRECT ANSWER - The weight in grams of one mole of a given element (g/mol) Avogadro's Number - CORRECT ANSWER - Number of particles in one mole of an element. 6 x 10^23. Avogadro's Principles - CORRECT ANSWER - n/T = k, or n1/T1 = n2/T2 Azimuthal Quantum Number (l) - CORRECT ANSWER - The second quantum number, specifies subshell. Includes four subshells, corresponding to l = 0, 1, 2, 3 (aka s, p, d, f). Maximum number of electrons that can exist within a subshell is 4l + 2. Must be from zero to n1. Balmer Series - CORRECT ANSWER - The group of hydrogen emission lines corresponding to transitions from upper levels n2 to n= 2 Bohr's Model of the Hydrogen Atom - CORRECT ANSWER - Single proton and neutron at the center of the atom, with a single electron orbiting it to form an electron cloud. Boiling Point Elevation - CORRECT ANSWER - ∆Tb = iKbm