Francium and Fluorine. They would react instantaneously and explosively.
However, this would never be done in an open lab. , because francium is radio-active.
However, Sodium (Grp (I)) and Chlorine (Grp(VII)), will react in a gas jar in the lab. But less vigorously than the above two.
Group 1 and group 7 elements doesn't react together.
The alkaline earth metals shown in column 2 of a wide form periodic table react more vigorously with water the greater their atomic mass.
all will react
Francium would react most violently with hydrochloric acid but all of them would react violently. Cesium and Rubidium would certainly react explosively. Potassium would be very violent and catch fire. Sodium would be quite violent.
There are 7 elements in group 1: hydrogen, lithium, sodium, potassium, rubidium, cesium, and francium. All of these (except hydrogen) are considered alkali metals. They react very easily with other elements.
group 1 elements.
Group one elements react vigorously with water.They even react when exposed to air.For example lithium reacts violently with water.
The alkaline earth metals shown in column 2 of a wide form periodic table react more vigorously with water the greater their atomic mass.
They do react vigorously.
Since they are alkali metals which react vigorously with most compounds in the environment, especially water. They need to be separated from the environment lest they explode.
elements are in the same group since they react similarly to other elements in that group.
all will react
All of them tend not to react with each other until you get lower down the group
Noble Gases
Noble Gases
Group 18, the noble gases, are elements that hardly react with other elements. This is because they have their full complement of eight valence electrons.
Group-18 elements least react with other elements. They are inert in nature. They are called noble gases.Elements in group 18 are less likely to react with any other elements. This group is made out of the noble gases. Its members are He, Ne, Ar, Kr, Xe and Rn.
Noble gases or group 18 elements