Exploring the Periodic Table and Its Elements

What motivated Dmitri Mendeleev to achieve greatness in his scientific career?

• His mother's sacrifices

• His early interest in glassmaking

• The rejection from the university in Moscow

• His father's blindness

What was Mendeleev's key realization that led to the development of the periodic table?

• Elements could be organized by their color

• Elements showed periodicity when arranged by atomic weight

• Elements were all metals

• Elements could be organized alphabetically

Which set of elements did Mendeleev predict before they were discovered?

• Transition metals

• Missing elements in the periodic table

• Alkaline earth metals

• Noble gases

Which group of elements did Mendeleev find to be extremely reactive with chlorine, fluorine, iodine, and bromine?

• Transition metals

• Noble gases

• Alkaline earth metals

• Alkali metals

What property makes the alkali metals highly reactive?

• Their ability to form cations with two positive charges

• Their desire to gain an electron

• Their ability to form anions with one negative charge

• Their desire to lose an electron and form a positive ion

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What is a key feature of the transition metals?

• High reactivity with water

• Ability to form negative ions

• Good conductors of electricity

• Stored in inert gases or oil

What was unique about Mendeleev's periodic table compared to other scientists' work at the time?

• It was printed in color

• It predicted the existence of undiscovered elements

• It was based solely on atomic weight

• It included all known elements

What did Mendeleev believe about the periodic table's significance?

• It was a way to make quick cash

• It was a divine pattern revealing the nature of God

• It was a complete list of all elements

• It was just a scientific curiosity

Why was de Chancourtois' version of the periodic table largely ignored?

• It was published after Mendeleev's table

• It was incorrect

• It was too complex to understand

• It lacked a graphical representation

What did Mendeleev deny the existence of?

• Atoms

• Electrons

• Noble gases

• Alkali metals