Exploring the Periodic Table's Evolution

Which scientist is most famous for arranging the elements into the first widely recognised periodic table?

• John Dalton

• Dmitri Mendeleev

• Ernest Rutherford

• Niels Bohr

What was the main basis for arranging elements in Mendeleev’s periodic table?

• Atomic number

• Atomic mass

• Number of neutrons

• Melting point

Which subatomic particle was NOT known at the time of Mendeleev’s periodic table?

• Proton

• Electron

• Neutron

• All were known

What is the modern periodic table arranged by?

• Atomic mass

• Atomic number

• Number of neutrons

• Density

Who discovered the electron?

• John Dalton

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

Which of the following is a property of metals?

• Brittle

• Good conductor of electricity

• Dull

• Low melting point

Which group in the modern periodic table contains the noble gases?

• Group 1

• Group 2

• Group 7

• Group 0

What did Mendeleev do when the properties of an element did not fit the pattern in his table?

• Ignored it

• Left a gap

• Changed the element’s properties

• Removed the element

Which early model of the atom described it as a solid sphere?

• Plum pudding model

• Nuclear model

• Dalton’s model

• Bohr model

Which element is in Group 1 and Period 2 of the modern periodic table?

• Hydrogen

• Lithium

• Sodium

• Potassium