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Chemistry exam 1
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Preguntas del test (2)
1Scientists sometimes replace one scientific model with a different model.
For example, in the early 20th century the plum pudding model of the atom was replaced by the nuclear model of the atom.
Explain what led to the plum pudding model of the atom being replaced by the nuclear model of the atom. [6 marks]
An experiment was carried out to direct [blank_start]alpha[blank_end] particles at a thin [blank_start]gold foil[blank_end] [1]. The [blank_start]plum pudding[blank_end] model suggested that mass and [blank_start]charge[blank_end] were [blank_start]evenly[blank_end] spread throughout the atom [1]. It was expected that the particles would be scattered evenly by the atoms. It was found that [blank_start]most[blank_end] alpha particles passed straight through the foil [1] meaning most of the atom is [blank_start]empty[blank_end] space [1]. A few alpha particles were deflected through large angles [1], meaning the atoms have a small, dense, positive [blank_start]nucleus[blank_end] [1]- AAlpha
- Bgold foil
- Cplum pudding
- Dcharge
- Eevenly
- Fmost
- Gempty
- Hnucleus
2Which scientist found evidence for the existence of neutrons?
- AJames Chadwick
- BNiels Bohr
- CErnest Rutherford
Información
- Descripción
- GCSE Chemistry Test sobre Chemistry exam 1, creado por Emily Stuart el 20/04/2021.
- Autor
- Emily Stuart
- Idioma
- English
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