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In which two ways was the periodic table categorised?
Why did Mendeleev leave gaps in the periodic table initially?
On which side of the periodic table are the metals found?
What does the group number tell us about the elements?
What are the columns called?
What are the rows called?
How many electrons are in the outer shell of magnesium?
Why does sodium and potassium react in a similar way?
State 3 properties of metals
Does potassium react more or less than lithium?
What products are formed when potassium reacts with chlorine?
What is the name given to the non-metals in group 7?
Why can bromine displace iodine? (displacement reactions)
Does argon or helium have the higher boiling point?