neutron
nucleus
nickle (the element)
nitrogen
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neutron
nucleus
nickle (the element)
nitrogen
Oxygen
Ozone
plutonium
petroleum
particle acceleration
planetarium
Quazar
Radiology
solar system
tecknicks
television
uranium
urology
ultraviolet
vacuum
water
x-ray
Y chromosome
zinc
another new topic
how about good old fashioned FOOD ~~
artichoke
apple
avacado
almonds
antipasta
banana
beets