Why was becquerel’s experiment a first step in discovering radioactivity?

a. it showed that a substance could phosphoresce when it was not exposed to light.

b. it showed that the substance that was used by becquerel could phosphoresce.

c. it showed that a substance could constantly emit radiation even if it was not exposed to light.

d. it showed that a substance emitted radiation when it
was exposed to light.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.