What is graphene? Why is graphene unique?

Some polymers may be strengthened considerably by a mechanism called 'branching'. This mechanism can be described as: Select one: O a. Aligning the long chain molecules in closely ordered proximity to each other be elongating the polymer. O b. Attaching molecules of the same mer as very long side groups, by strong covalent bonds to the backbone of the main chain. Oc. Forming covalent double bonds between adjacent molecules by heating in the presence of oxygen or sulphur. Od. Attaching molecules of a different mer as very short side groups, by weak covalent bonds to the backbone of the main chain.

1) Pick the one with the largest radius.Explain your selection using chemical principlesa. Ca2+ or Cl b. As or Br

What allotrope of sulfur is is stable at room temperature? S8 S16 S2 S16