The lower left (Cesium) ones and the upper right's(Fluorine).
An element below phosphorus in the periodic table would be expected to be more reactive. For example, sulfur is below phosphorus in the periodic table and is more reactive.
Elements are more reactive as you go down the periodic table and to the left.
The reactivity of an element can be determined by observing its tendency to undergo chemical reactions. Elements higher up in the periodic table tend to be more reactive than those lower down. Additionally, elements that are further to the left of the periodic table are typically more reactive than those to the right.
Francium is more reactive than cesium. It is the most reactive metal due to its position in the periodic table - the farther down and to the left an element is, the more reactive it tends to be.
F
No, francium is not the most explosive element in the periodic table. It is the most unstable and rarest naturally occurring element, but other elements, such as the alkali metals cesium and rubidium, are more reactive and can be more explosive under certain conditions.
No chromium is more reactive than chromium because it it located farther right on the periodic table than nickel. No chromium is more reactive than nickel because it it located farther right on the periodic table than nickel. No chromium is more reactive than nickel because it it located farther right on the periodic table than nickel. No chromium is more reactive than nickel because it it located farther right on the periodic table than nickel.
Elements in the same group, or vertical column, of the periodic table all have the same valence electron configuration, and therefore all have similar reactivity.See the Related Questions to the left for more information.
Elements become less reactive as you move from left to right across the periodic table. This is due to how many valence electrons (outer-most electrons) the element has; the less valence electrons, the more reactive the element.
I would expect cesium, element 55, to be more reactive than potassium. This is because cesium is further down the alkali metal group in the periodic table, making it more eager to lose an electron compared to potassium.
There are more metals than any other type of element in the periodic table.
Metals are more reactive elements.