Describe the silica tetrahedron

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.