Which of the following atoms has an electric charge? a sodium atom with 11 protons, 11 electrons, and 12 neutrons
a calcium atom with 20 protons, 18 electrons, and 20 neutrons
a helium atom with 2 protons, 2 electrons, and 2 neutrons
an iron atom with 26 protons, 26 electrons, and 30 neutrons

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.