Please help me with thiss ill mark you brainlist

When a scientific theory has been tested and proved by the scientific community, it becomes a law

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope

What are the other two pieces of glassware you used in this experiment that you could obtain hundredths digit accuracy?