The best answer between the two choices would be the first option TRUE because the scientific method is used to do more advance research and investigation on things.
Mr: 207.2
m=n×Mr= 6.53×207.2= 1353.02g
Hey there!
A half-life means after a certain amount of time, half of that substance will be gone/changed after that time.
If 50%, or half, of the element remains after 4000 years, that means the half life must be 4000 years.
Hope this helps!
Answer: The three major categories of energy for electricity generation are fossil fuels (coal, natural gas, and petroleum), nuclear energy, and renewable energy sources
Explanation:
