Answer:
To get number of neutrons, you must have the mass number and atomic number of that atom.
atomic number is number of protons
The lines occurring in an emission spectrum are all electromagnetic waves, which means that their speed in a vacuum is
3 x 10⁸ m/s
We can use the equation,
v = fλ
which relates the velocity of a wave to the frequency and wavelength. Substituting values,
3 x 10⁸ = f * 434 x 10⁻⁹
f = 6.91 x 10¹⁴ Hz
The frequency of the wave will be 6.91 x 10¹⁴ oscillations per second.
Distance and period of time is the correct answer
Hope this helps!
Answer: 3
Explanation: You may not always get feedback that would be helpful and requesting the answer would be cheating
im mirándonos a través de su ventana just so you know
