Assertion: silicon | /r/HasProperty | discovered by jöns jacob berzelius
Facets:
value: by heating chips of potassium
type: MANNER
value: in 1824
type: TEMPORAL
Source sentences:
text: Silicon was discovered by Jöns Jacob Berzelius, a Swedish chemist, in 1824 by heating chips of potassium in a silica container and then carefully washing away the residual by-products.