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level: Properties of elements

Questions and Answers List

Question	Answer
What is a property that is true of most metals? They are _.	hard
Select two ways to categorise elements on the period table.	periods and groups
Compare group 1 and group 2 elements, in the same period.	Group 1 elements are more reactive than group 2 elements
Compare elements within group 1	Elements higher up the group are generally less reactive than elements lower down the group
Most elements on the period table are __.	metals
Each element on the periodic table has a unique _.	symbol
One of the first periodic tables was developed by __.	Dmitri Mendeleev
Select the items that you won’t find on the periodic table.	Atomic compounds
True or false, the atomic numbers for unknown elements can be predicted by using known elements.	true
True or false, Dmitri Mendeleev found a pattern in the atomic numbers, so he could predict the properties for ‘missing’ elements.	true
Dmitri Mendeleev arranged elements on the table according to _.	atomic mass
The modern periodic table is based on one that was first devised in which century?	the 19th century
The two main categories in the period table are _.	Metal and non-metal