Chromium is a transition metal, and oxygen has an oxidation number of -2. use this information to match each compound to its chemical formula. Cro —>
Cro2 —>
Cro3 —>
Cr2O3 —>
Chromium(Vl) oxide
Chromium(lV) oxide
Chromium(lll) oxide
Chromium(ll) oxide

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

The allotropes of carbon include a variety of structures that include three-dimensional tetrahedral lattices, planes of hexagonal rings, cylindrical tubes of hexagonal rings, and spheres of five- and six-membered rings. similar shapes of network covalent atomic solids are possible with carbon nitride, boron, and pure silicon (e.g., silicene is a graphene-like allotrope of pure silicon). in contrast, silicates exist as either highly ordered or amorphous (more random) three-dimensional lattices. what could explain why there are there no naturally occurring sheets, stacked sheets, cylindrical tubes, or spheres of network covalent atomic solids composed of silicon and oxygen (sio2)? would pure silicate structures make good lubricants or good electrical conductors?