Which statement best explains why radon and krypton do not bond easily with other elements?

athey have many electron shells, so their protons do not attract electrons strongly.
they have eight electrons in their valence shells, so they are stable without gaining or losing electrons.
their valence shells are empty, so they do not need to bond with other elements to be more stable.
their valence shells are so close to the protons in the nucleus that bonding cannot happen like in other elements.

What material does not melt at any temperature

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

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?