Passage VII
In the ionosphere (the atmosphere between 50 km and 2,000 km above Earth's surface), gaseous atoms and molecules lose electrons and become ions when struck by energetic solar radiation (X-rays and ultraviolet radiation). The figure shows the electron density, in free electrons/cm3, for a portion of the ionosphere above a 45°N latitude location. The electron density and the specific ions present in the D, E, and F layers of the ionosphere are important in the long-distance transmission of high frequency radio signals. Electron density varies between daytime and nighttime as well as between maximum sunspot count and minimum sunspot count.
39. Before being struck by solar radiation, gaseous atoms and molecules in the ionosphere are electrically neutral. After they are struck, are the ions that are formed positively charged or negatively charged?
Your Answer is
Correct Answer is A
Explanation
Look at the third line of the article and mention lose electrons. After losing electrons (the electrons themselves are negatively charged), they should be positively charged, so choose positive charge