When two or more elements combine chemically what do they form?
The combination of two or more elements to form one compound is called combination reaction. | a)- Between elements | C + O 2 → CO 2 | Carbon completely burnt in oxygen yields carbon dioxide |- | b) Between compounds | CaO + H 2 O → Ca(OH) 2 | Calcium oxide (lime) combined with water gives calcium hydroxide (slaked lime) |- | c) Between elements and compounds | 2CO + O 2 → 2CO 2 | …
In chemistry the law of multiple proportions states that if two elements form more than one compound between them then the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers. This law is sometimes called Dalton's Law named after John Dalton the chemist who first expressed it. For example Dalton knew that the element carbon forms two oxides by combining with oxygenin different …
Law of multiple proportions - Wikipedia
Chemical compound - Wikipedia
Combination reaction - Wikipedia
In chemistry a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions suspensions and colloids. Mixtures are one product of mechanically blending or mixing chemical substances such as elements and compounds …
Wed May 16 2001 14:30:00 GMT-0400 (Eastern Daylight Time) · Two or more elements combined into one substance through a chemical reaction form a chemical compound. All compounds are substances but not all substances are compounds. A chemical compound can be either atoms bonded together in molecules or crystals in which atoms molecules or ions form a crystalline lattice.
Nuclear fusion is a ...
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