How Atomic Physics Started

The video explores the development of atomic theory, starting with Greek philosophers who conceptualized atoms as indivisible units. It covers John Dalton's laws and atomic rules, including the law of multiple proportions. The video also discusses Avogadro's introduction of the mole and William Proud's hydrogen-based theories. Finally, it highlights Dmitry Mendeleev's creation of the periodic table, which predicted unknown elements. The video concludes with a promise to explore more physics in future sessions.

Which Greek philosopher is known for the idea of 'atomus', meaning unsplittable?

• Plato

• Democritus

• Socrates

• Aristotle

What is the key concept of John Dalton's Law of Multiple Proportions?

• Compounds have variable compositions

• Elements combine in fixed ratios

• Atoms are indivisible

• Mass is conserved in reactions

According to Dalton's atomic theory, what is true about atoms of a given element?

• They are always reactive

• They have different masses

• They are identical in mass

• They can be divided

What did Avogadro introduce that was crucial to understanding chemical reactions?

• The conservation of mass

• The electron theory

• The concept of the mole

• The periodic table

What was William Prout's hypothesis about hydrogen?

• It is a noble gas

• It cannot form compounds

• It is the fundamental building block

• It is the heaviest element

What was a major flaw in Mendeleev's periodic table?

• It didn't account for isotopes

• It was based on incorrect atomic weights

• It couldn't predict noble gases

• It included too many elements

What did Mendeleev predict that was later confirmed?

• The structure of the atom

• The existence of unknown elements

• The behavior of electrons

• The existence of noble gases