In solid NaCl, each sodium ion is surrounded. by six chlorine ions and each chlorine ions is surrounded by six sodium ions. This arrangement results in a... A) malleable noncrystalline structure
B) ductile, malleable solid with mobile electrons
C) weak crystalline solid that conducts electricity
D) high melting point and crystalline structure

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.