What best explains how two oxygen atoms, each with six valence electrons, can bond with each other?
One atom can lose two electrons so that the other atom can gain them and have eight valence electrons
One atom can lose four electrons to the environment so that a total of eight valence electrons remains
Each atom can share two electrons with the other so that each atom has eight valence electrons.
Each atom can lose two electrons so that there is a total of eight valence electrons between the atoms

Embryos of different species look very similar, which shows that the organisms share a ancestor.

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?