Complete the following equation: 141467cn?

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers

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

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!