Redirected from Group 15 element
The pnictogens are:
The spelling pnicogen is also recorded. Both spellings derive from the Greek πνίγειν (pnigein), to choke or stifle, which is a property of nitrogen.
... influence on papal decisions.
In 1309 Clement had a commission sit at Avignon
for the purpose of reconciling the conflicting parties.
Ubertino of Casale[?], th ...
Buy Halloween Costumes
Kids.Net.Au - kids safe portal for children, parents, schools and