The Periodic Table Flashcards
What do elements in a column have in common? What is a column technically called?
Similar chemical properties
Groups
What does the group number of an element show?
The number of e- in its outer shell
What does the row of the periodic table show? What is a row technically called?
How many shells an atom has
Period
Metal oxides are..
basic
Non-metal oxides are…
acidic
Why does reactivity down a group of metals increase?
The nucleus has a lower magnetic affect on e- in outer shells
As you go down the group there are more shells which get further away
The inner shells shield the e- from the attraction of the nucleus
Therefore it’s easier for the atom to give its e- away and react
Why does reactivity decrease down the group in non-metals
As you go down the group there are more shells
The nucleus has a lower maginetic pull on the e- in these shells because they are further away
The inner shells shield the e- from attraction of the nucleus
Therefore it is harder to attract electrons from other atoms and react
Define displacement reaction
A reaction where a more reactive element displaces a less reactive element from its compound
What colour and state are the halogens?
Chlorine: green gas
Bromine: red-brown liquid
Iodine: dark grey solid
What is a redox reaction?
A reaction where one substance loses electrons at the same time as another gains electrons
What is the mnemonic for redox ?
Oxidation Is Loss (of electrons) Reduction Is Gain (of electrons)
