David found that water can be created in a lab by burning hydrogen gas in air. he concluded that water is not a compound because only hydrogen was used to form water. what is wrong with david's conclusion

Which terms are used to identify pure substances

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

What is the difference between covalent bonds and ionic bonds? covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between charged atoms. covalent bonds involve the transfer of electrons between charged atoms; ionic bonds involve the sharing of electrons between atoms. covalent bonds involve the sharing of pairs of electrons between atoms; ionic bonds involve the sharing of single electrons between atoms. covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the sharing of protons between charged atoms.