<span>Serous Membrane
This is a thin film that lines the interior body depressions and organs, for example, the heart, lungs, and stomach cavity. The thin film is comprised of mesothelium tissue which starts from the mesoderm. The serous film takes into consideration frictionless motion in various indispensable organs.</span>
Answer:
Softer? I hope this helps :)
Explanation:
After two half-lives or 60 years, 7.5 g of the element will be left.
<u>Explanation:</u>
<u>Half-life:</u>
- In simple words, Half-life can be defined as the amount of time needed for a quantity to fall to half its value as contained at the beginning of the time period.
- In this problem the half-life of the element is thirty years, then after thirty years half of the sample would have decayed and half would be left as it is.
- After thirty years (The first half-life ) 30 /2 = 15 g declines and 15 g remains disappeared.
- And after another sixty years (The two half-lives) 15 /2 = 7.5 g declines and 7.5 g remains disappeared.
- After two half-lives or 60 years, 7.5 g of the element will be left.
