HELIUM) has chemical properties so different from those of the other elements that it cannot be placed in any group. *

Which other elements contain the same number of outer electrons as sodium

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.

What is the formula of the ionic compound composed of calcium cations and chloride anions