Answer: 0.50 m/s
Explanation: it’s on khan academy this was the correct answer
Bohr described the Planetary theory. the atom has a positive nucleus with electrons orbiting around them like planets.
Well, first, let's recognize that there is no such thing as a force that is
balanced or unbalanced.
When we say that a group of two or more forces is balanced, we mean
that when you add up all the magnitudes and directions of the forces, the
whole group adds up to zero, so they have the same net effect as if there
were no force at all.
Flourine:
There are 9 protons, 10 neutrons, and 9 electrons.
Bromine: Ther are 35 protons, 45 neutrons, and 35 electrons.
