An atomic scientist was studying an atom and through experimentation found that the total negative charge of the
area surrounding the nucleus is -9. which statement correctly describes this atom?
this atom has nine clouds.
this atom has nine electrons,
this atom has nine neutrons.
this atom has nine protons.

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

Approximately what wavelength of light is best absorbed by chlorophyll a