Atomic Theory

Which scientist developed the atomic theory?

• JJ Thomson
• Ernest Rutherford
• John Dalton
• James Chadwick

Electron cloud is based on

• Quantum Mechanics
• Gold Foil Experiment
• Matter is made up of small particles called atoms
• Nuclear Theory

He developed the planetary model of the atom.

• Rutherford
• Bohr
• Chadwick
• Dalton

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

John Dalton wrote postulates to make the idea of the atom useful. Which postulate below was proven wrong?

• All elements are made up of tiny indivisible particles called atoms.

• The atoms of one element are different from the atoms of another element.

• Atoms of different elements chemically combine to form chemical compounds.

• During chemical reactions, atoms are rearranged.

Which describes the same atomic number but different numbers of neutrons?

• ions

• isotopes

• atoms

• neutrons

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

Who came up with this model of an atom?

• J.J. Thompson
• Ernest Rutherford
• Neils Bohr
• James Chadwick