Topic 3 - Periodicity Flashcards
Which are the transition elements?
- groups 3 -11
Which are the s-block elements?
- groups 1 and 2
- including He
Which are the p-block elements?
- groups 13 - 18
- excluding He
Which are the d-block elements?
- groups 3 - 12
Which are the f-block elements?
- lanthanoids and actinoides
What is periodicity?
- the repeating pattern of physical and chemical properties shown by periods
What is the trend in atomic radius (on the periodic table)?
- down a group: increases
- across a period: decreases
What is the trend in ionic radius (on the periodic table)?
- down a group: increases
- across a period: decreases
What is the trend in ionisation energy (on the periodic table)?
- down a group: decreases
- across a period: increases
What is the trend in electronegativity (on the periodic table)?
- down a group: decreases
- across a period: increases
What is the trend in electron affinity (on the periodic table)?
- down a group: varies
- across a period: increases
What is the trend in melting point (on the periodic table)?
- down a group: depends
- across a period:
What is the trend in metallic character (on the periodic table)?
- down a group: increases
- across a period: decreases
What is the atomic radius?
- the distance from the nucleus to the outermost electron in orbit
What is the ionic radius?
- check
What is ionisation energy?
- the minimum amount of energy required to remove one electron from an atom in its gaseous state
What is electron affinity?
- the energy change when 1 mol of electrons is added to 1 mol of isolated atoms in gaseous phase
What is electronegativity?
- the relative attraction that an atom has for a shared pair of electrons when it is covalently bonded to another atom
What is the melting point?
- the amount of energy required to break a bond(s) to change the solid phase of a substance to a liquid
