State 5 modifications for Dalton's atomic theory
Answers
Answer:
Here u go...
Explanation:
Key Points
Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.
Dalton based his theory on the law of conservation of mass and the law of constant composition.
The first part of his theory states that all matter is made of atoms, which are indivisible.
The second part of the theory says all atoms of a given element are identical in mass and properties.
The third part says compounds are combinations of two or more different types of atoms.
The fourth part of the theory states that a chemical reaction is a rearrangement of atoms.
Parts of the theory had to be modified based on the discovery of subatomic particles and isotopes.
OK, here's the answer you wanted so badly.
Dalton's Atomic Theory was really a revolution in chemistry: it provided the modern basis for how chemical reactions occur. The main points are:
1) Each element is composed of tiny pieces of matter called atoms. Atoms are indivisible, and can not be created or destroyed.
2) All atoms of an elemnt are identical to each other, and have identical mass and properties.
3) For each chemical compound, different elements combine in whole number ratios. No fractions of atom are allowed.
This approach is inaccurate in 2 ways, which must be taken into account for certain circumstances. The first is that with the discovery of fusion and fission, we know that atoms CAN be created or destroyed. Second, the discovery of isotopes meant that not all atoms of a given element are identical. Isotopes of any given atom have different masses, and under certain circumstances, slightly different chemical properties. These are the needed modifications to make Dalton's theory current.