What is the wavelength (in nanometers) of a photon emitted during a transition from ni = 6 to nf = 3 states in the H atom?

Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.