Answer:
This element is Boron. The atomic number is 5
Explanation:
Answer:
After 3 half lives 10 g of radio active material left.
Explanation:
Given data:
Total amount of radio active material = 80 g
Amount left after 3 half lives = ?
Solution:
At time zero = 80 g
At first half life = 80 g/2 = 40 g
At 2nd half life = 40 g/2 = 20 g
At 3rd half life = 20 g/2 = 10 g
Thus, after 3 half lives 10 g of radio active material left.
Hello jesusadrian, Welcome to Brainly!
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Decomposers break down dead organic material to water, carbon dioxide, minerals and other simple chemicals which can again be consumed by green plants.
Fossils are great for providing evidence for an evolutionary change! Scientists can see how long life has existed on Earth by studying fossil records. Any living organism that is preserved, is considered a fossil, including plants! Fossils take 10,000 years to be formed, showing that, yes, fossil evidence supports that these cycles of evolution take quite a long time.
Hope this helps!
-Moiselle
Answer:
i would help i just dont know sorry
Explanation:
