C2: The Periodic Table Flashcards
How did John dalton arrange the elements?
In order of their atomic weights
What did Mendeleev do?
He arranged the elements so that a regularly occurring pattern in their properties could be seen
Why did Mendeleev leave gaps in the periodic table?
For elements that should exist, but hadnt been discovered yet
What is group 0 also known as?
The noble gases
What is group 1 also known as?
The alkali metals
What happens to the reactivity as you go down group 1?
Increases
What happens to the melting and boiling points as you go down group 1?
Decreases
What is group 7 also known as?
The halogens
What happens to the melting and boiling points as you go down group 7?
Increase
What happens to the reactivity as you go down group 7?
Decreases
What is a displacement reaction?
A more reactive element will displace a less reactive element
What are 4 properties of the transition metals?
Good conductors, hard and strong, dense and high melting points