Exploring the Evolution of Atomic Models

Who were the first people to discuss the idea of atoms?

• Einstein and Bohr

• Newton and Galileo

• Democritus and Leucippus

• Aristotle and Plato

What did Democritus believe about the nature of atoms?

• They were indivisible and came in different shapes and sizes

• They were made of earth, water, air, fire, and ether

• They orbited the nucleus in circular paths

• They were made of protons and neutrons

What was John Dalton's main contribution to atomic theory?

• He discovered the nucleus

• He developed the quantum mechanical model

• He discovered electrons

• He proposed that atoms were indivisible particles

What did JJ Thompson discover about atoms?

• They contain electrons

• They are made of protons and neutrons

• They are indivisible

• They have a nucleus

What was the key finding of Ernest Rutherford's gold foil experiment?

• Atoms are made of earth, water, air, fire, and ether

• Atoms are indivisible

• Atoms contain electrons

• Atoms have a positively charged nucleus

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How did Niels Bohr describe the movement of electrons?

• Electrons are randomly distributed

• Electrons orbit the nucleus in circular paths

• Electrons are indivisible

• Electrons are part of the nucleus

What did Erwin Schrodinger propose about electron movement?

• Electrons buzz around the atom sketching out different shapes

• Electrons are part of the nucleus

• Electrons are randomly distributed

• Electrons orbit the nucleus in circular paths

What are the shapes sketched out by electrons in the quantum mechanical model called?

• Circles

• Orbits

• Paths

• Orbitals

Who discovered protons?

• James Chadwick

• Niels Bohr

• Ernest Rutherford

• JJ Thompson

Who discovered neutrons?

• Niels Bohr

• James Chadwick

• Ernest Rutherford

• JJ Thompson