dalton atomic theory and the laws of constant proportion
Answers
Answer:According to the 6th postulate of Dalton's atomic theory, atoms of each element are similar and have same weight and atoms of one element combine with atoms of another element to form compounds. Hence the sixth postulate explains the law of constant proportions. ... This is law of constant proportion.
Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms cannot be created or destroyed. Atoms of different elements may combine with each other in a fixed, simple, whole number ratio to form compound atoms.
Explanation:
Ans:
Dalton's Atomic Theory
1) All matter is made of atoms. Atoms are indivisible and indestructible.
2) All atoms of a given element are identical in mass and properties
3) Compounds are formed by a combination of two or more different kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.
5) In a given compound, the relative number and types of atoms are constant.
Law of Constant Composition or Definite Proportions:
According to this law “a pure chemical compound always contains the same elements combined together in the same fixed ratio by mass”.
Ex: Even though water obtained from different sources like river, well, lake, sea...etc, it always contains hydrogen and oxygen elements in the ratio of 1:8 by mass.
Answer:
Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.
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Law of constant proportion - (chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight.
Law of definite proportions
Law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics"
Chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
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