1) Complete the sentence: In today's periodic table, elements are arranged in order of increasing a) atomic mass b) atomic weight c) number of neutrons d) increasing number of electronns 2) What name is given to rows across the periodic table? a) Groups b) Periods c) Rows d) Lines 3) What name is given to columns down the periodic table? a) Groups b) Periods c) Lines d) Columns 4) What is the name of the scientist that created the modern periodic table? a) James Chadwick b) Dmitri Mendeleev c) Niels Bohr d) Ernest Rutherford 5) Before Mendeleev, how was the periodic table arranged? a) Increasing atomic weight b) Increasing atomic mass c) Increasing number of protons d) Increasing number of electrons 6) What was different about the way Mendeleev organised his periodic table? (choose 2!) a) He swapped some elements around, even if they weren't in order of atomic weight b) He left gaps for undiscovered elemnts c) He realised that some elements weren't really elements d) He added in some made up elements 7) Why did people eventually begin to believe Mendeleev? a) Elements were discovered that fit in the gaps he left b) Other elements didn't fit his patterns c) He discovered his own new element, called mendelevium d) He published his work in a scientific journal

Periodic Table History

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