Can anyone explain me about the various blocks present in the modern periodic table.
Can anyone explain me about the various blocks present in the modern periodic table.
Dear Student,
The modern periodic table is divided into 4 blocks
- s-block
- p-block
- d-block
- f-block
About each blocks:
s- Block Elements
Group 1 (alkali metals) − 1 electron in outermost shell
Group 2 (alkaline earth metals) − 2 electrons in outermost shell
Alkali metals form +1 ion and alkaline earth metals form +2 ion.
Reactivity increases as we move down the group.
They are never found in pure state in nature. (Reason − they are highly reactive)
p - Block Elements
Elements belonging to Groups 13 to 18
Outermost shell contains 3 to 8 electrons respectively.
Group 18 − noble gases
Group 17 − halogen
Group 16 − chalcogens
Non-metallic character increases from left to right across a period.
d- Block Elements (Transition Elements)
Elements of group 3 to group 12
Called transition elements
Zn, Cd, and Hg do not show properties of transition elements.
All are metals. They form coloured ions, exhibit variable oxidation states, paramagnetism, and are used as catalysts.
f- Block Elements
They are called Lanthanoids and Actinoids
They are called inner-transition elements.
All are metals.
Actinoid elements are radioactive.
Elements after uranium are called Transuranium elements.
Dear Student,
The modern periodic table is divided into 4 blocks
- s-block
- p-block
- d-block
- f-block
About each blocks:
s- Block Elements
Group 1 (alkali metals) − 1 electron in outermost shell
Group 2 (alkaline earth metals) − 2 electrons in outermost shell
Alkali metals form +1 ion and alkaline earth metals form +2 ion.
Reactivity increases as we move down the group.
They are never found in pure state in nature. (Reason − they are highly reactive)
p - Block Elements
Elements belonging to Groups 13 to 18
Outermost shell contains 3 to 8 electrons respectively.
Group 18 − noble gases
Group 17 − halogen
Group 16 − chalcogens
Non-metallic character increases from left to right across a period.
d- Block Elements (Transition Elements)
Elements of group 3 to group 12
Called transition elements
Zn, Cd, and Hg do not show properties of transition elements.
All are metals. They form coloured ions, exhibit variable oxidation states, paramagnetism, and are used as catalysts.
f- Block Elements
They are called Lanthanoids and Actinoids
They are called inner-transition elements.
All are metals.
Actinoid elements are radioactive.
Elements after uranium are called Transuranium elements.
