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Preguntas del test (10)
1The Law of definite composition states that
- Astates that matter can be changed from one form into another, mixtures can be separated or made, and pure substances can be decomposed, but the total amount of mass remains constant. We can state this important law in another way
- Bthe statement that in a pure compound the elements are always combined in fixed proportions by weight.
- Cstatement that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.
2The Law of conservation of Mass states
- Astatement that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.
- Bstates that matter can be changed from one form into another, mixtures can be separated or made, and pure substances can be decomposed, but the total amount of mass remains constant. We can state this important law in another way.
- Cthe statement that in a pure compound the elements are always combined in fixed proportions by weight.
3Democratis and Dalton were similar in that:
- AThey both tested their expiriments and came up with similar results
- BThey both agreed with the theory that atoms cannot be divided
- CThey both thought that atoms could continue to be divided into even smaller particles
- DThey had nothing in common
4Democratis believed:
- Ahypothesized that all matter (plus space and time) is composed of tiny indestructible units, called atoms.
- BHypothosized the idea of quantum physics
- CHypothosized electrons and the way they move around the nucleus
- Datoms were invisible and indestructable
- Ecompounds made of two or more different types of atoms
- Fchemical reaction: a rearangement of atoms
- Gthought that atoms were divisible
5Daltons theory:
- Aelements are composed of atoms, tiny idestructable units of matter
- Batoms of the same element are identical
- CAtoms were divisible
- Dchemical reactions=atoms ARE destroyed or changed
- Eatoms of different elements=different properties and masses
- Fcompounds are formed from two or more atoms of different elements to form a molecule
- Gchemical reactions=atoms seperated, rearanged, but no atoms destroyed or changed
6Dalton was more publicaly accepted than Democratis because:
- AHe seemed to be a more trustworthy person
- BHis conclusions were backed with experiments
- CAlthough he lacked proof, his writings were so convincing that he made a good point
7
How did Dalton's atomic theory help support the law of conservation of mass?- AAll matter is made up of atoms
- B compounds consisted of atoms of different elements combined together in a particular ratio
- CAtoms of different elements have different properties
- DAtoms can be niether created or destroyed
- E Atoms of the same element are identical
8Which model is democratis?
- Aphilosophical
- Bplum pudding model
- C(experimentally proven)
- Dnucleus
- Eorbiting electrons
- Aphilosophical
9Which is Daltons?
- A
- Bphilosophical
- Cplum pudding model
- Dproven
- E
- A
10Why was Dalton wrong?
- AThe indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons.
- Blg
Información
- Descripción
- Chemistry Test sobre Sin título, creado por lyda.hanson el 20/11/2014.
- Autor
- lyda.hanson
- Idioma
- English
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- 4
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