Radioactive dating uses the half-life of different radioactive materials to provide information about the of theof the sample

V1t2 = v2t1 is an expression of who’s law

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next