Atomic Structure

Who proposed this atomic model?

1. Atoms are indivisible.

2. Different elements have different properties.

3. Atoms of different elements combine to form compounds.

• John Dalton

• Joseph John Thomson

• Ernest Rutherford

Who proposed this atomic model?

1. An atom consists of positive charge and negative charge.

2. An atom is electrically neutral.

3. Negatively charged electrons are fixed in the positive sphere.

• Joseph John Thomson

• John Dalton

• Niels Bohr

Who proposed this atomic model?

1. Atoms are mainly empty space.

2. Positive charge is concentrated at the center of atoms, the nucleus.

3. Electrons move around the nucleus.

• Joseph John Thomson

• Ernest Rutherford

• John Dalton

Who proposed this atomic model?

1. Electrons orbit the nucleus. The orbits have specific size and energy.

2. The energy is related to its size and energy.

3. The lowest energy is found in the smallest orbit.

Electrons can move between each shell when gaining or losing energy.

• Ernest Rutherford

• Niels Bohr

• Erwin Schrodinger

Who proposed this atomic model?

1. Electrons move around the nucleus in a cloud not orbits.

2. Orbital helps us predict the area where we can find electrons.

3. The closer position to the nucleus, the higher chance to find electrons

• Niels Bohr

• Erwin Schrodinger

• Ernest Rutherford

An experiment that allowed charged tiny oil droplets to pass through a hole into an electric field. By varying the strength of the electric field the charge over an oil droplet was calculated, which always came as an integral value of ‘e.’

• Millikan's Oil Drop Experiment

• Bohr's Oil Drop Experiment

• Maxwell's Oil Drop Experiment

Who proposed that the atom will rest comfortably in the ground state and will not collapse for lack of energy?

• James Maxwell

• Max Planck

Who proposed that different atoms and molecules can emit or absorb energy in discrete quantities only? The smallest amount of energy that can be emitted or absorbed in the form of electromagnetic radiation is known as quantum.

• James Maxwell

• Max Planck