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Because they are highly reactive with many other elements.
Because they are very reactive.
These elements are highly unstable because of for group1- IP is low and for group 7 electron affinity is high
Hydrogen is placed in group-1 and period-1 in the periodic table as hydrogen has only one electron.
group 1 elements are stored in oil because they are highly reactive elements.
group 1 elements
Potassium and Hydrogen
Seven elements are found in group A or group 1.These are Hydrogen,Lithium,Sodium,Potassium,Rubidium,Caesium and Francium. Except Hydrogen all are metals.
All the chemical elements from group I and II are very reactive; it is impossible to found these elements in nature in elemental state.
Because they are highly reactive with many other elements.
Because they are very reactive.
Group 1 elements have very low electronegativies and group 7 elements have very high electronegativities, so that both are reactive with almost every other element, the group 1 elements by donating electrons and the group 7 elements by accepting electrons.
These elements are highly unstable because of for group1- IP is low and for group 7 electron affinity is high
Hydrogen is placed in group-1 and period-1 in the periodic table as hydrogen has only one electron.
For example the chemical elements in the group 1, alkali metals.
group 1 elements are stored in oil because they are highly reactive elements.
The elements in Group 1 have one valence electron in their outermost s orbital.