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Nonmetal
The nonmetals are a diverse group of elements in the periodic table, characterized by their lack of metallic properties and…
F-Block Element
The f-block elements are found in two rows placed separately at the bottom of the periodic table, known as the…
D-Block Element
The d-block elements occupy the central portion of the periodic table, spanning Groups 3 to 12. They are often referred…
P-Block Element
The p-block elements occupy Groups 13 to 18 of the periodic table and form a major portion of it. Their…
S-Block Element
The s-block elements are found on the left side of the periodic table and include Group 1 (alkali metals) and…
Halogen
The halogens make up Group 17 of the periodic table and include the elements fluorine (F), chlorine (Cl), bromine (Br),…
Alkaline Earth Metal
The alkaline earth metals form Group 2 of the periodic table and consist of six elements: beryllium (Be), magnesium (Mg),…
Periodic Table Overview
The periodic table of elements is one of the most important tools in chemistry, serving as a systematic arrangement of…
Bohr Model
The Bohr model of the atom, proposed by Danish physicist Niels Bohr in 1913, was a groundbreaking step in the…
Alkali Metal
The alkali metals are a group of elements in Group 1 of the periodic table, consisting of lithium (Li), sodium…
The Great Dying
The Great Dying, formally known as the Permian–Triassic extinction event, was the most catastrophic mass extinction in Earth’s history, occurring…
Carboniferous Period
The Carboniferous Period, spanning roughly 359 to 299 million years ago, was a pivotal era in Earth’s history, notable for…
Pangaea
Pangaea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, approximately 335 to 175 million years…
List of Chemical Elements of the Periodic Table
Hydrogen (H) Helium (He) Lithium (Li) Beryllium (Be) Boron (B) Carbon (C) Nitrogen (N) …
Chapter: Atoms and Molecules
Atom Electron Proton Neutron Molecule Molecular Weight Vs Molar Mass Molecular Weight Calculator Periodic Table Rare-earth…