Question

Please help

1. The most chemically reactive metal elements are soft. These metals are so reactive that they react spontaneously with water and/or substances in the atmosphere and therefore must be stored under oil. Where is this family (group) of metals located in the periodic table?

2. Based on for Li, Na and K and the relationship between reactivity and positions of elements in the periodic table, what would you predict for the reactivity of Rb?

3. Looking at the reactivity of Ca and Mg with HCl, what would you predict as to the behavior of Be with HCl? Explain your answer.

4. Fluorine reacts with almost anything it touches. Toothpastes containing fluorides help maintain the toughness of tooth enamel, Ca10(PO4)6(OH)2, by replacing the hydroxide ion with fluoride ion. The resulting fluoride enamel is nonreactive. Is the reactivity (or non-reactivity) of the fluoride (F - ) ion consistent with the pattern observed in the reactions of halides in this experiment? Explain