Taxonomy

What is the first name of atoms according to Dalton's atomic theory?

What is the first name of atoms according to Dalton's atomic theory?

Atomos.

What did Dalton propose about the structure of atoms?

Atoms are full spheres.

What is the smallest particle according to Dalton?

Atom.

According to Dalton, what is true about the atoms of an element?

Atoms are identical.

What did Dalton suggest about compounds?

Compounds are made of two or more elements.

What model did Thomson propose for the structure of an atom?

Plum pudding model.

In the plum pudding model, what do electrons represent?

The plums.

According to Thomson's cathode ray tube experiment, what happens when a charged object is brought near?

It causes opposing forces.

What negatively charged particle did Thomson discover?

Electrons.

What misconception did Thomson have about electrons?

He thought electrons were stationary.

What significant discoveries did Rutherford make?

Discovery of protons and nucleus.

What experiment did Rutherford conduct to discover the nucleus?

Gold foil experiment.

What was observed in Rutherford's gold foil experiment?

Most alpha rays passed through, but some were deflected.

What does the deflection of alpha particles in Rutherford's experiment suggest?

There must be a balancing force.

What does the nucleus contain according to Rutherford's model?

Protons.

What did Chadwick discover in relation to atomic structure?

Neutrons.

What did Bohr propose about electrons around the nucleus?

Electrons move in stable orbits.

How does the energy of an electron change according to Bohr's model?

It depends on the size of the orbit.

What determines the energy state of an electron in Bohr's theory?

Protons pulling on them; less pull means more energy.

What is the first orbit called in Bohr's model?

Ground state.

What are orbits beyond the first orbit referred to in Bohr's theory?

Excited states.

How can orbits be represented in Bohr's theory?

As n=1, 2, 3 etc. or K, L, M, N.

What occurs during absorption of energy by electrons?

Electrons move to higher energy states.

What is the relationship between absorbed energy and the energy between orbits?

Absorbed energy equals the energy difference between orbits.

What happens to electrons when they emit energy?

They move to lower orbits.

What is the energy of the emitted energy when electrons drop to lower orbits?

Emitted energy equals the energy difference between orbits.

What additional effect can occur when energy is emitted?

Heat can also be released.