CBSE Class Notes Online – Classnotes123
CBSE Class Notes, Worksheets, Question Answers, Diagrams , Definitions , Diffrence between , Maths Concepts, Science Facts Online – Classnotes123
The periodic table is a scientific chart that organizes elements by atomic number and reveals patterns in chemical behavior. It helps explain how atoms bond, react and form substances. From noble gases to alkali metals, each group shares unique properties, all guided by electron structure-a key to understanding the elements of the universe.
The Periodic Table of Elements: What It Is and How It Works Read More
Transition elements, or d-block metals (Groups 3–12), feature partially filled d-orbitals and exhibit unique properties such as variable oxidation states, colored compounds, and catalytic activity. Located centrally on the periodic table, they have high atomisation enthalpy due to strong metallic bonding and unpaired d-electrons. Inner transition elements include lanthanides and actinides with f-orbitals.
What Are Transition Elements? Properties, Periodic Table Location, and Atomisation Enthalpy Read More
Nuclear transmutation changes one element or isotope into another by altering protons or neutrons. It occurs naturally (e.g., in stars, radioactive decay) or artificially (e.g., in reactors, particle accelerators). This process is key to element formation, medical isotope production, nuclear energy, and waste reduction. While gold can be transmuted, it’s economically unfeasible.
Nuclear Transmutation: How Elements Change in Nature and Science Read More
Matter is the substance that forms everything around us. It can be classified into elements, compounds, and mixtures. Elements contain only one type of atom, compounds are chemically bonded atoms in fixed ratios and mixtures are physical combinations of substances. These forms are fundamental in chemistry, as it reveals how substances interact.
What Are Elements, Compounds, and Mixtures? Key Differences and Examples Read More