History of atomic theory by Berlyn Amano

Greek word which means indivisible or uncuttable.

• Atomos

• Atom

• Element

• Ion

He discovered electrons

• J.J. Thomson

• John Dalton

• Ernest Rutherford

• Niels Bohr

This is an experiment conducted on a tube where there are 2 plates with opposite charges in which an electric charge had been released and attracted to the positive plate

• Cathode ray tube experiment

• Alpha scattering experiment

• polonium-beryllium experiment

• gold foil experiment

The latest atomic model

• planetary model of atom

• electron cloud model of atom

• nuclear model of atom

• plum-pudding model of atom

According to this model of atom, you can tell the exact number of electrons but you cannot tell its exact location

• plum-pudding model of atom

• electron cloud model of atom

• billiard ball model of atom

• nuclear model of atom

What is the electronic configuration of Calcium?

• 1s²2s²2p⁶3s²3p⁶4s²

• 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶4f¹⁴5d¹⁰6s¹

• 1s²2s²2p⁶3s²3p⁶4s¹

• 1s ²2s ²2p ⁶3s ²3p ⁶4s ²3d ¹⁰4p ⁶5s ²4d ¹⁰5p ²

What is the electronic configuration of Potassium?

• 1s²2s²2p⁶3s²3p⁶4s²

• 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶4f¹⁴5d¹⁰6s¹

• 1s²2s²2p⁶3s²3p⁶4s¹

• 1s ²2s ²2p ⁶3s ²3p ⁶4s ²3d ¹⁰4p ⁶5s ²4d ¹⁰5p ²

He proposed the quantum mechanical model of atom

• Werner Heisenberg

• Niels Bohr

• Ernest Rutherford

• John Dalton

Proton was discovered by

• John Dalton

• Democritus

• Leucippus

• Ernest Rutherford

H, O, Li, Ca, K, Rb are all examples of?

• Letters

• Elements

• Compounds

• Symbols