G8 Organising the Elements

What does periodic mean?

• Chemical properties

• The smallest possible thing

• A repeating pattern

• Physical properties

Who was the first scientist to organise the elements in a periodic table?

• Henry G.J. Moseley

• Dmitri Mendeleev

• John Dalton

• Democritus

What was so special about Mendeleev's periodic table?

• It left spaces for unknown elements, and predicted their properties

• It included many new elements

• It was the first evidence that atoms exist

• It was the first evidence that elements exist

Which element was discovered after Mendeleev predicted it's existence, and had properties closely matching his predictions?

• Iron

• Uranium

• Helium

• Germanium

How did Mendeleev organise his first periodic tables?

• Increasing atomic mass

• Increasing atomic number

• Descreasing atomic mass

• Descreasing atomic number

How did Henry Moseley order the periodic table, improving on Mendeleev's version?

• Increasing atomic mass

• Increasing atomic number

• Descreasing atomic mass

• Descreasing atomic number

How is the modern periodic table arranged?

• Increasing atomic mass

• Increasing atomic number

What are the columns in the periodic table based on?

• Similar atomic mass

• Similar atomic number

• Similar physical and chemical properties