The total number of electrons in the outer shell of a sodium atom is?
A. 1
B.2
C.8
D.18

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =

Helium decays to form lithium. which equation correctly describes this decay?