In the mnemonic for biologically important elements, CHOPKINS CaFe Mg Na Cl, what does the letter C stand for? Cell; Carbon Cysteine d Cytosine Curtains
What is the electrical charge of an atom? Depends on the number of negatively charged protons. Since protons and electrons cancel each other, the net charge is neutral. Since all atoms have negatively charged electrons, it is the number of these. The number of neutrons defines the overall charge, so it depends on the isotope. All atoms are neutral because only protons have significant mass.
Since the mass of carbon is 12.011, which of its three isotopes is most abundant in nature? Carbon 14, the one used for radioisotope dating; Carbon 13, the one used in mass spectrometry; Carbon 12, another stable isotope. Not an answer. Not an answer.