Topic 1b Flashcards
Who made the first organised periodic table?
Mendeleev
What proved mendeleevs periodic table correct?
The discovery of isotopes
Why do all the elements in the same group react the same way?
Have the same amount of electrons in outer shell
What are metals?
Elements with positive ions
What are non metals?
Elements which form negative ions and bond covalent with other non metals
Physical properties of metals(3)
Strong and malleable
Conduct electricity and heat
High boiling and melting points which means often solids at room temperature
Physical properties of non metals(4)
Brittle
Low boiling / melting points
Generally don’t conduct electricity and heat
Lower density than metals
What are group 1 metals called?
The alkali metals
What are group 1 metals called?
The alkali metals
Why are alkali metals very reactive?
Have 1 electron in outer shell
What are group 7 elements also called
Halogens
Trends of halogens as you go down
Become less reactive
Higher melting and boiling points
Higher reletive atomic mass
What bond do halogens make with metals
Ionic
More reactive halogens will…
Replace less reactive halogens
What are group 0 elements also called
Noble gasses
