Dec 16, 2025 · All the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds.

Dec 26, 2025 · Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization. Today, vinyl, Teflon, liquid crystals, semiconductors, and …

Dec 4, 2025 · A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. Substances are either …

5 days ago · What is lead as a chemical element? What does lead look like and what is its symbol on the periodic table? Where is lead found in nature?

6 days ago · Sodium bicarbonate, white crystalline or powdery solid that is a source of carbon dioxide and so is used as an ingredient in baking powders, in effervescent salts and beverages, and as a …

Jan 10, 2026 · Metabolism, the sum of chemical reactions that take place in living cells, providing energy for life processes and the synthesis of cellular material. Living organisms are unique in that they …

CHEMICAL meaning: 1 : of or relating to chemistry; 2 : working by means of chemicals

Jan 13, 2026 · Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Nov 28, 2025 · What is bromine? What does bromine look like and where can it be found? What are the basic chemical properties of bromine? How is bromine used in industry or everyday life?

Dec 5, 2025 · Chemical industry, complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives. Raw materials include fossil fuels and inorganic …