What experimental evidence was provided for the nuclear model of the atom? a. line spectra of hydrogen b. cathode rays bending toward strong magnets c. alpha particles bouncing off of gold foil d. none of the above

c. alpha particles bouncing off of gold foil. More test answers on https://studyhippo.com/quiz-1-atomic-structure/

nuclear model of the atom:rocks and photographic plates (1896);who? significance?

Henri Bequerelrocks overexposed his photographic plates, therefore the rocks were producing light, therefore were radioactive More test answers on https://studyhippo.com/chemistry-chapter-2-24085/

nuclear model of the atom:Marie Curie said?

“radioactivity” shows that atoms are made of smaller particles More test answers on https://studyhippo.com/chemistry-chapter-2-24085/

What was the nuclear model of the atom?

1)The nuclear model that resulted from the alpha particle scattering experiment was a positively charged nucleus surrounded by a cloud of negative electrons 2) Niels Bohr said that the electrons orbiting the nucleus do so at certain distances called energy levels. His theoretical calculations agreed with the experimental data. 3) Evidence from further experiments changed the model to have a nucleus made up of a group of particles (protons) which all had the same positive charge that added up to the overall charge of the nucleus 4) About 20 years after the idea of a nucleus was accepted, in 1932 James Chadwick proved the existence of the neutron, which explained the imbalance between the atomic and mass numbers More test answers on https://studyhippo.com/gcse-physics-topic-4-atomic-structure/

nuclear model of the atom:Gold foil experiment (1909)who? sig?

hans geiger and ernest marsden; found approx. 1 in 8,000 a-particles scattered. this was used for the basis of Rutherford’s nuclear model More test answers on https://studyhippo.com/chemistry-chapter-2-24085/

Outline the evidence that supports a nuclear model of the atom.

GEIGER-MARSDEN EXPERIMENT: •positive alpha particles fired at thin gold leaf •expected to travel straight through •some of alpha particles were deflected through huge angles •numbers being deflected at any given angle agreed with an inverse square law of repulsion from the nucleus •evidence for electron energy levels comes from emission and absorption spectra • existence of isotopes provides evidence for neutrons More test answers on https://studyhippo.com/ib-physics-topic-7-atomic-and-nuclear-physics-and-topic-13-quantum-physics-and-nuclear-physics/

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Nuclear Model Of The Atom Flashcards, test questions and answers

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What is Nuclear Model Of The Atom?

The Nuclear Model of the Atom is a scientific model which explains how matter is structured and how it interacts. It was developed in the early 20th century by physicists Ernest Rutherford, Niels Bohr, and others. The model states that an atom consists of a nucleus surrounded by electrons in orbit around it. The nucleus contains protons and neutrons, while the electrons are located in shells or energy levels surrounding the nucleus.The nuclear model explains why atoms behave as they do by providing a structure for understanding their properties and interactions with other atoms. For instance, it can be used to explain why different elements have different chemical properties and why some elements form compounds while others do not. It also helps us understand why certain elements can undergo radioactive decay, as well as why certain reactions take place more easily than others.The model also provides insight into subatomic particles such as quarks, leptons, gluons, neutrinos, and photons which make up matter at the smallest scales. By better understanding these particles we can gain further insight into the nature of matter itself and how it behaves at very small scales. In addition to its explanatory powers for atomic behavior, the nuclear model also has practical applications in fields such as medicine where radiation therapy is used to treat cancer or nuclear power plants which generate electricity for cities around the world. In these cases we use our knowledge of subatomic particles to generate energy or direct radiation towards cancer cells in order to destroy them without harming healthy tissue nearby.