List the following atoms in order of
increasing electronegativity
Cl, As, Ag, W, Ra

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

What does the symbol (–hfus) indicate in a phase change?

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?