Top definition
A Transition Metal is an element from the D block of the periodic table which forms at least one ion with an incomplete d subshell containing at least one electron.

Used ambiguously by the WJEC to annoy students, especially Sam Jones.
Sam: 'Hey Alex, what's a transition metal?'

Alex: 'It's a D block element that forms ions with incomplete d orbitals.'

Sam 'Yeah, but the WJEC aren't really clear on their definition. It's causing a lot of confusion.'

Alex: 'That's exactly the type of shit those cunts would do!'
by GFawkes March 27, 2013
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug