Which of the following elements can only form single covalent bonds when forming molecular compounds? a) Nitrogen
b) Hydrogen
c) Carbon
d) Oxygen

Can someone me with questions 12 and 13 plz.

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

|using the periodic tablewarm-upuse the periodic table in the tools bar to answer the following questions.what elemental classification does oxygen belongto? done