Assertion: metal's electron | /r/CapableOf | go into shell
Facets:
Source sentences:
text: the 19th and 20th electrons go into shell 4 (this represents the limit GCSE/GCSE students need to know about electron arrangements – details on Atomic Structure page.
text: A period starts when the next electron goes into the next available main energy level or shell (the very reactive Group 1 alkali Metals ).