This is how fluorine appears in the periodic table. Which is one piece of information that "9” gives about an atom of fluorine?

the atomic number
the atomic mass
the mass of neutrons
the number of neutrons

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

In salt water solution, the salt is the blank

Apound is approximately 0.45 kilogram. a persons weighs 87 kilograms. what is the persons’s weight, in pounds, when expressed to the correct number of significant figures