Answer:
Lithium
Explanation:
it is the only metal listed.
We wouldn't have the majority of the people around that we do now, soldiers would have bleed out on the field, people needing blood transplants due o having cancer, people in car accidents, people with brain bleeds. The population would practically be cut in half.
There are 21 atoms represented in the formula :) hope this helped.
Brenda is correct!
Hope this helps!:)