Francium is not reactive as it is a very weak and small substance of an atom in the element. Francium is used useless things, so therefore it is not reactive.
Because francium has a larger atomic radius, due to a higher presence of protons and neutrons.
Caesium belong to Group (1) The Alkali metals. Since it is the lowest in the Group , except for 'Francium', its reactivity with water and oxygen is 'explosive'. Going down the Group (1) the elements are , with increasing reactivity , Lithium, Sodium, Potassium, Rubidium, Caesium, and Francium. You will not find francium in the open lab. as it is radio-active.
The reactivity of francium with water would be more reactive than most of the other alkali metals, because the lower down the column of alkali metals you go in the periodic table the more reactive the element becomes in cold water. Therefore, if francium was to react with cold water it would react by giving off an explosion.
lithium, sodium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium, radium
Very high, the most reactive metal, apart from Caesium, we exclude Francium because it's radioactive.
The general reaction is:2 Me + 2 H2O = 2 MeOH + H2where Me is an alkali metal.Very probable francium react violent with water.
Francium is the most reactive metal. Reactivity increases and you go down a family and decreases as you go across a period on the Periodic Table. Francium is the farthest left and the lowest so it is the most reactive.
Sodium is one of the most reactive, but the number one spot would probably go to francium. However, it is impossible to gather enough francium to demonstrate this reactivity, so the the title is usually given to cesium.
It's important to note that plutonium and uranium (element names are not normally capitalized in the middle of a sentence) have isotopes which are stable enough that their reactivity is experimentally known, while the most stable isotope of francium has a half-life of about 20 minutes. Francium's reactivity is therefore partially a matter of conjecture... the energy given off by its radioactive decay would literally vaporize any reasonably sized piece. That said, as an alkali metal francium would be much more reactive than uranium or plutonium, both of which are transition metals.
Alkali metals have increasing reactivity going down the group. Francium may not be considered as it is not a stable atom: it is radioactive. The next four are Cesium, Rubidium, Potassium and Sodium in decreasing reactivity order.
When an alkali metal is placed in water it will float and produce a gas like hydrogen which ignites in the presence of oxygen - producing a flame. The reactions get more and more vigorous as you move down the group. I may only be a grade 9 student but I think I may know this. Lithium, Sodium and Potassium are HIGHLY reactive to water. Lithium lightly sizzles when it reacts with water, and it produces a small amount of gas. Sodium reacts a little more, it bubbles on the water and creates a large amount of gas. Potassium has the most violent reaction to water, it actually pops when it comes into contact. It really explodes when you put it in water. It almost produces a red flame on top of the water. So you see, they are ordered by the level of reactivity. -------------------- Francium is the most reactive and electronegative chemical element; unfortunately is extremely rare and currently not available for chemical experiments. Also is very radioactive. The increasing order of reactivity with water is: Lithium, Sodium, Potassium, Rubidium, Caesium, Francium. The reactivity of chemical elements is controlled by their electronegativity; this parameter is decreasing from lithium to francium. The minimal electronegativity is equivalent to maximal reactivity.
The most reactive metal is francium (Fr). However, it is impossible to gather any sufficient quantity of francium to demonstrate this reactivity. The other alkali metals, lithium, sodium, potassium, rubidium, and cesium will all react rapidly, even explosively with water.