The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be prepared from the reaction between sodium metal and fluorine gas. Which properly represents the balanced chemical equation for this reaction? Na(s) + F2(g) → NaF2(s)
Na(s) + F(g) → NaF(s)
7Na(s) + F(g) → Na7F(s)
2Na(s) + F2(g) → 2Na2F(s)
2Na(s) + F2(g) → 2NaF(s)
Why is it important to understand this equation? What do you think could happen if this is incorrect?

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Will give brainliest it is a lab from k12 here is the linkfor each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. type your answer here. (score for question 3: of 5 points) were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. type your answer here. (score for question 4: of 5 points) make a general statement about the reactivity of the metals in this experiment. type your answer here.

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles