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The 1871 periodic table constructed by Dmitri Mendeleev. The periodic table is one of the most potent icons in science, lying at the core of chemistry and embodying the most fundamental principles of the field. The history of chemistry represents a time span from ancient history to the present. By 1000 BC, civilizations used technologies that ...
Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.
H-8/4, Islamabad. Website. fbise .edu .pk. The Federal Board of Intermediate and Secondary Education ( Urdu: وفاقی ہیئت برائے متوسط و ثانوی تعلیم ), commonly known as FBISE, is an autonomous board under the Ministry of Federal Education for examining the intermediate and secondary education in Pakistan and abroad ...
Children mix chemicals in test tubes as part of a hands-on chemistry education program in Samara, Russia. Chemistry education (or chemical education) is the study of teaching and learning chemistry. It is one subset of STEM education or discipline-based education research (DBER). [1] Topics in chemistry education include understanding how ...
Class 10th students give exam in five core subjects which are English, Hindi/other languages of India (regional), Mathematics, Science and Social Studies.(If it is state board then Compulsory State language is taken )There is an option of choosing a sixth subject of your choice like Computer Science, Information Technology, Music, Fine Arts ...
Chirality (chemistry) Two enantiomers of a generic amino acid that are chiral. ( S )-Alanine (left) and ( R )-alanine (right) in zwitterionic form at neutral pH. In chemistry, a molecule or ion is called chiral ( / ˈkaɪrəl /) if it cannot be superposed on its mirror image by any combination of rotations, translations, and some conformational ...
t. e. A chemist (from Greek chēm (ía) alchemy; replacing chymist from Medieval Latin alchemist) [1] is a graduated scientist trained in the study of chemistry, or an officially enrolled student in the relevant field. Chemists study the composition of matter and its properties. Chemists carefully describe the properties they study in terms of ...
Dissociation (chemistry) Dissociation in chemistry is a general process in which molecules (or ionic compounds such as salts, or complexes) separate or split into other things such as atoms, ions, or radicals, usually in a reversible manner. For instance, when an acid dissolves in water, a covalent bond between an electronegative atom and a ...