Topic: Half-Life
A certain element has a half-life of 1,000 years. How much of a sample of this element remains after 2,000 years?

Options:

25%

100%

50%

200%

friedrich meischer discovered it in white blood cell

answer; synapse; i believe this is correct,plz check first good luck;

true skin; another name for the dermis. lies directly beneath the epidermis and is often referred to as the true skin. outermost layer of epidermis, consisting of dead cells.