Three
0.0000639mol
lithium plus. removing electron from something that is positive is much harder.
A 300mg lithium carbonate capsule contains about 112mg of elemental lithium.
Lithium, regardless of its atomic mass, has 3 protons.
Presumably you're talking about the battery. Lithium batteries are "primary batteries"; that is, they're not rechargeable. Lithium ion batteries are rechargeable, and are therefore a much better choice for a cell phone.
10
about 16
about $300/lb
This will depend on both the type and size of the lithium battery. Also some lithium battery types actually contain metallic lithium sheets while others the lithium is only in the form of ions.
A lithium battery cr2032 battery does not really cost that much. You should be able to find these batteries in the store for $3 or $4 tops.
number of electons
electons