Periodicity Flashcards
What decides which element is in which block?
Depending on which orbital the highest energy electrons are in, (e.g. s-orbital, p-orbital, d-orbital).
What is a group?
The vertical column of elements.
What happens to the reactivity of s-block metals as you go do down the group?
They get more reactive as you go down.
What happens to the reactivity of p-block non metals as you go down the group?
They get less reactive as you go down.
What is a period?
Horizontal rows of elements are called periods.
What is periodicity explained by?
The electron arrangement of an element.
What type of elements are those that are in group 1, 2, 3
Metals
What structures do the elements in group 1, 2 and 3 have.
Giant structures
What properties does silicon have?
They have some metallic properties and is therefore classed as a semi-metal.
Why do the melting and boiling points increase from sodium to aluminium?
The metallic bonding strength increases due increased ion charges and the amount of electrons increase.
What do the melting points of non-metals depend on?
Intermolecular forces
What does the atomic radii tell us?
The size of atoms.
What is the atomic radius affected by?
The type of bond.
Why do nobles gases not get compared in atomic radii?
They cannot form covalent bonds.
Why can you not measure the radius of a lone atom?
There is no clear point where electron cloud density drops to 0.
