A radium atom emits a photon of light with a frequency of 4.40 X 10^15 Hz (1/s). What is the wavelength of this photon in nm?

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Adepositional also feature that forms where a stream enters a lake or an ocean is a

Which item is most likely part of the safety contract