Atomic Theory and Discoveries Quiz

Who was the first to name the atom?

• John Dalton

• Dmitri Mendeleev

• Democritus

• JJ Thomson

What did John Dalton propose about atoms in 1803?

• Atoms are divisible

• Atoms are solid spheres that can't get any smaller

• Atoms are positively charged spheres

• Atoms have a nucleus

Who developed the first periodic table of elements?

• Ernest Rutherford

• Henry Moseley

• Dmitri Mendeleev

• JJ Thomson

What is the key feature of JJ Thomson's Plum Pudding Model?

• Atoms are indivisible

• Atoms have a nucleus

• Atoms are positively charged spheres with negative particles embedded

• Atoms are solid spheres

What experiment did Ernest Rutherford conduct to develop his nuclear model?

• Gold foil experiment

• Oil drop experiment

• Cathode ray experiment

• Double-slit experiment

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What did Henry Moseley discover about elements?

• Elements are made of solid spheres

• The number of protons is unique to each element

• Atoms are indivisible

• Elements are organized by atomic mass

What is the charge of electrons according to the Niels Bohr Model?

• Positive

• Negative

• Neutral

• No charge

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According to the Schrodinger and Heisenberg Electron Cloud model, how do electrons behave?

• Travel in fixed orbits

• Remain stationary

• Surround the nucleus in an electron cloud that is divided into shells

• Move randomly without any pattern

What is the nucleus of an atom made of?

• Electrons and protons

• Neutrons and electrons

• Protons and neutrons

• Only protons

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Where is the mass of the atom primarily located?

• Electron cloud

• Nucleus

• Outer shell

• Energy levels