Each energy level has at least one orbital with two electrons. Energy level two can have two subleves and two orbits. But the maximum orbits are 7!
Hurricane Harvey and hurricane Irma
3 is the right answer because it increases it's strength
Answer: 232 nm
Explanation: As it is well known the energy for the one dimentional box is given by:
where h is the Planck constant, m the electron mass and L the width of the box. n is the energy level
For n=3 we a energy equal :9.62 * 10^-19 J= 6.01 eV
For n=1 the energy is: 1.069 *10^-19 J=0.66 eV
The energy difference Is 5.35 eV so by using this relationship
λ=1240/Energy = 232 nm
The ball's acceleration is constant in magnitude and direction, from the instant it leaves your hand, until the instant it hits the ground, no matter what direction or speed you throw it.
It's the acceleration of gravity, on whatever planet you happen to be standing when you throw the ball.