The Periodic Table: Crash Course Chemistry

The video explores the significance of the periodic table, focusing on Dmitri Mendeleev's journey and his revolutionary discovery of periodicity among elements. It delves into the classification of elements into groups and Mendeleev's lasting impact on chemistry, highlighting his unique insights and the evolution of the periodic table over time.

What was the main reason Mendeleev's mother took him to St. Petersburg?

• To start a new business

• To find a job for him

• To enroll him in a university

• To visit family

What did Mendeleev realize about the periodicity of elements?

• It was irrelevant to chemistry

• It had a repeating pattern every seven elements

• It was a random occurrence

• It was based solely on atomic weights

Which group of elements is known for being extremely reactive and forming positive ions?

• Halogens

• Transition metals

• Alkali metals

• Noble gases

What did Mendeleev do when he found gaps in his periodic table?

• Removed the gaps

• Predicted the properties of undiscovered elements

• Filled them with random elements

• Ignored them

Which of the following is a characteristic of transition metals?

• They are poor conductors of electricity

• They are gases at room temperature

• They are highly reactive with water

• They are good conductors of electricity

What was one of the reasons Mendeleev's periodic table was initially held back from publication?

• He was unsure of its accuracy

• He wanted to include more elements

• He needed money from a textbook

• He was waiting for approval from peers

What did Mendeleev believe about the periodicity of elements?

• It was a mystical phenomenon

• It had no scientific basis

• It was a cosmic pattern

• It was irrelevant to chemistry

What was a major limitation of the alternative periodic table design by Shan Courtois?

• It included too many elements

• It couldn't be printed effectively

• It was not scientifically accurate

• It was too complex to understand

What is the role of electrons in the periodicity of elements?

• They explain the repeating patterns

• They are irrelevant to the periodic table

• They have no role

• They determine the atomic weight

How did Mendeleev's periodic table help future chemists?

• It provided a guide for discovering new elements

• It was used to teach mathematics

• It was a tool for predicting weather patterns

• It was a decorative piece