How many electrons are in the outermost energy level of oxygen who's atomic number is 8?

If a plot weight (in g) vs. volume (in ml) for a metal gave the equation y= 13.41x and r^2=0.9981 what is the density of the metal?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Which statement accurately represents the arrangement of electrons in bohr’s atomic model?