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Transcript of Trends
To know the trends in:
1. Atomic Radius
2. Ionic Radius
3. Ionisation energy
5. Electron affinity
Going across a period and dwon a group of the periodic table.
The first electron affinity is the energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous 1- ions.
S, P, D and F block mean?
What element is in group 5 period 3?
What is a Metalloid?
Unlike a ball, an atom doesn't have a fixed radius. The radius of an atom can only be found by measuring the distance between the nuclei of two touching atoms, and then halving that distance.
Trends in atomic radius in Periods 2 and 3
This is defined as:
The energy required to remove ONE MOLE of electrons from ONE MOLE of gaseous ions under standard conditions
Redefine electron affinity and explain the trends
Find the values for group 7 and explain them
1. Nuclear charge