Reactivity is the name your looking for I believe.
Half life is the time taken by a radioactive isotope to decay by half its original mass. In this case, the halflife of the radioactive isotope is 5000 years.
Initially the mass is 100 %; thus the mass that will be left will be given by;
New mass = Original mass × (1/2)^n where n is the number of half lives;
n = 10000/5000 = 2
New mass = 100% ×(1/2)^2
= 100 % × 1/4
= 25%
Therefore; the mass left after 10000 years is 25% or 1/4 of the original mass.
<span>In the written directions the indicator that the matter contains protein is when the solution turns a purple color. Therefore we can conclude that if your sample causes the solution of Copper Sulfate and Sodium Hydroxide to turn purple, it does indeed contain protein.</span>
Answer:
Incomplete precipitation of barium sulfate
Explanation:
The student has precipitated and digested the barium sulfate on his/her side. But on the addition of 
in the solution, the solution become cloudy. This happened because incomplete precipitation of barium sulfate by the student. When is added, there are still sulfate ions present in the solution with combines with and forms 
and the formation of this precipitate makes the solution cloudy.
Glass 1 Freshwater
The egg went directly to the base of the glass. Consequently it has sunk and did not drift
237.0
237 (1 glass)
1.000
Glass 2
Water with 2 teaspoons of salt
A similar outcome for glass 2 as container 1 when egg was set into the container it sank to the base.
248.4
237
1.048
Glass 3
Water with 3 teaspoons of salt
In reference to glass 1 and 2 the egg sank to the base for a third time.
254.1
237
1.072
Glass 4
Water with 4 teaspoons of salt
The egg remained gliding to where a little bit of the egg was standing out on the top, and when pushed down the egg returned up.
259.8
237
1.096
Hope this helps!
