What is the trend in first ionization energies as one moves across the fourth period from k to kr? what is the trend in first ionization energies as one moves across the fourth period from to ? first ionization energies increase slightly going from k to kr and atomic sizes decrease. first ionization energies decrease slightly going from k to kr and atomic sizes decrease?

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