Question

the movement of electrons between energy levels explains *
1 point
that the atom is a solid ball of positive charge.
the light you see when fireworks explode.
how electrons exist inside the nucleus of the atom.
all statements are explained by the movement of electrons between energy levels.

Explanation:

• The first option is incorrect because the "solid ball of positive charge" model (Thomson's plum - pudding model) is outdated, and electron energy level movement has nothing to do with it. Atoms have a nucleus with positive charge and electrons in energy levels around it, not a solid positive - charge ball.
• The second option is correct. When fireworks explode, the heat energy excites electrons in atoms of the fireworks' chemicals to higher energy levels. When these electrons fall back to lower energy levels, they release energy in the form of light, which is what we see.
• The third option is incorrect. Electrons are not inside the nucleus; they exist in energy levels (orbitals) outside the nucleus.
• The fourth option is incorrect because the first and third statements are not explained by electron energy level movement.

Answer:

B. the light you see when fireworks explode.