Skincare Flashcards
1
Q
What will exposure to UV light result in?
A
in molecules gaining sufficient energy for covalent bonds to be broke, this causes sunburn
2
Q
How do sunscreens prevent sunburn?
A
they prevent UV light from reaching the skin
3
Q
What is a free radical?
A
a substance that has unpaired electrons
4
Q
What are the 3 steps in the free radical chain reaction?
A
initiation, propagation and termination
5
Q
What are free radical scavengers?
A
molecules which can react with free radicals to form stable molecules and prevent chain reactions
6
Q
What are free radical scavengers added to?
A
cosmetics, food products and plastics.
