Fill in the suitable word in the blanks is the following question. The electron in the outermost orbit is called __________ electron.

Fill in the suitable word in the blanks is the following question. The

1.	Fill in the suitable word in the blanks is the following question. The electron in the outermost orbit is called __________ electron.
A.	valence
B.	covalent
C.	acceptor
D.	donor
Answer» B. covalent