For each electronic configuration given, choose the electronic configuration of the element that would match its chemical properties.
(1) 1s²2s²2p⁶3s²

a) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶
b) 1s²2s²2p⁶3s²3p³
c) 1s²2s²2p³
d) 1s²2s²

(2) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

a) 1s²2s²2p⁶3s²
b) 1s²2s²
c) 1s²2s²2p⁶
d) 1s²2s²2p⁶3s²3p³

(3) 1s²2s²2p³

a) 1s²2s²2p⁶
b) 1s²2s²
c) 1s²2s²2p⁶3s²3p³
d) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

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16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.