C2-4 The Periodic Table

Which chemist made the first proper periodic table?

• Gregor Mendel

• Dimitri Mendeleev

• Nelson Mandela

• Josef Mengele

How did Mendeleev order his periodic table?

• Atomic Number

• Atomic Mass

• Similar elements together

• Left gaps for undiscovered elements

Scientists before Mendeleev ordered the periodic table by atomic mass. In which TWO ways was Mendeleev's table different from other earlier scientists?

• He left gasps for undiscovered elements

• He sorted by atomic mass

• He sorted the elements by density

• He moved some elements to fit with other similar elements

In what order is the modern periodic table?

• Atomic Number

• Atomic Mass

• Similar elements together

• Left gaps for undiscovered elements

In the modern periodic table, elements with similar properties form columns.

What name is give to these columns of similar elements?

• Periods

• Shells

• Groups

• Quarters

Which of these trends are observed in a group of elements?

• They all react in similar ways

• They get bigger as you go down the group

• They are more reactive down the group

• They transition from metal to non-metal

What is the link between the group to which an element belongs and its electrons?

• The group is the same as the number of electrons

• All groups have the same number of protons in the outer shell

• The group number is the same as the number of outer electrons

• The group number shows us which period the element is in

In the modern periodic table elements are added based on their proton number. Elements are in horizontal rows, what name is given to there row?

• Periods

• Shells

• Groups

• Quarters

In the modern periodic table elements are added based on their proton number. As you go down the periodic table there are more rows. What does a change of row represent?

• When periods are finished and new ones are started

• Each new period represents electrons going into the next highest shell.

• A new period is a regular repeating pattern, hence the name periodic table

• New rows are added as more elements are discovered

The period to which an element belongs corresponds to....

• The number of outer electrons

• The group an element belongs to

• The number of electron shells

• The number of outer electrons