write the general features of S block elements
Answers
Answer:
If the elements were houses in our hypothetical s-block neighborhood, they would be very uniform, each one only slightly different than the other. This is markedly different compared to the other neighborhoods on the periodic table, which have a wider variety of houses in many shapes, sizes and colors.
All of the s-block elements are metals. In general, they are shiny, silvery, good conductors of heat and electricity and lose their valence electrons easily. In fact, they lose their trademark s orbital valence electrons so easily that the s-block elements are considered to be some of the most reactive elements on the periodic table.
Sodium, an s-block element, is a silvery and soft metal.
Chucks of sodium metal
The elements in column 1, known collectively as the alkali metals (except hydrogen), always lose their one valence electron to make a +1 ion. These metals are characterized by being silvery, very soft, not very dense and having low melting points. These metals react extremely vigorously with water and even oxygen to produce energy and flammable hydrogen gas. They are kept in mineral oil to reduce the chance of an unwanted reaction or worse, an unwanted explosion.
Like a few other elements in the s-block, potassium reacts energetically with water.
Potassium reacting with water.
The elements in column 2, known as the alkaline earth metals (except helium), always lose their two valence electrons to make a +2 ion. Like the alkali metals, the alkaline earth metals are silvery, shiny and relatively soft. Some of the elements in this column also react vigorously with water and must be stored carefully.
S-block elements are famous for being ingredients in fireworks. The ionic forms of potassium, strontium and barium make appearances in firework displays as the brilliant purples, reds and greens.
S-block elements in action.
Fireworks display
Francium is considered to be the most rare naturally occurring element on earth. It is estimated that there is only ever one atom of Francium present on earth at a time. Francium has a very unstable nucleus and undergoes nuclear decay rapidly. As soon as it exists, it doesn't
Here Is Your Ans
****
Features of S block elements :-
➡the last electron goes into 's' orbital
➡they ,generally, have low ionnisation enthalpy i.e the give one electron easily
➡they have largest size in their respective periods
➡They are good conductors of heat and electricity
➡They are highly reactive elements
➡They form basic oxides
**
Follow Me