Half-life is the length of time it takes for half of the radioactive atoms of a specific radionuclide to decay. A good rule of thumb is that, after seven half-lives, you will have less than one percent of the original amount of radiation.
<h3>What do you mean by half-life?</h3>
half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive.
<h3>What affects the half-life of an isotope?</h3>
Since the chemical bonding between atoms involves the deformation of atomic electron wavefunctions, the radioactive half-life of an atom can depend on how it is bonded to other atoms. Simply by changing the neighboring atoms that are bonded to a radioactive isotope, we can change its half-life.
Learn more about half life of an isotope here:
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brainly.com/question/13979590</h3><h3 /><h3>#SPJ4</h3>
Answer:
200.0 g of A, and 21.00 g of B.
Explanation:
Let's call the grams of food A as x and the grams of food B as y, so the units of niacin and retinol in food A are the units per gram multiplied by the mass:
Niacin: 0.22x, Retinol: 170x
And in food B:
Niacin: 0.40y, Retinol: 95y
The total unitis of niacin is 52.4 and of retinol is 35995, thus:
0.22x + 0.40y = 52.4
170x + 95y = 35995
Let's multiply the first equation by -772.7, and sum with the second one:
-170x - 309y = -40490
170x + 95y = 35995
---------------------------------------
-214y = -4495
y = 21.00 g of B
Thus,
0.22x + 0.40*21.00 = 52.4
0.22x = 44
x = 200.0 g of A
Answer:
Kinetic theory of gases is a description of gas as a large number of non-stop random moving particles (atoms or molecules, generally without distinction in physics, are called molecules). Fast-moving molecules continuously collide with other molecules or the walls of the container. Molecular motion theory is to explain the macroscopic properties of gas, such as pressure, temperature, volume, etc., through the composition and motion of molecules. The theory of molecular motion believes that pressure does not come from static repulsion between molecules, as Newton’s conjecture, but from collisions between molecules that move thermally at different speeds.
The molecule is too small to be seen directly. The random movement of pollen particles or dust particles under the microscope-Brownian motion, is a direct result of molecular collisions. This can be used as evidence of the existence of the molecule.
Temperature is a measure of the average kinetic energy of the particles in a substance. Temperature of a volume of air represents the average kinetic energy of its molecules. Temperature is a measure of the average kinetic energy of a substance.
According to Kinetic Molecular Theory, the average kinetic energy of gas molecules is a function only of temperature. where T is the Kelvin temperature and k is Boltzmann's constant.
Answer:
7.348×10∧7 mg
Explanation:
Given data:
weight in pound= 162 lbs
weight in mg=?
we know that one pound is equal to 453.6 g and 453592.37 mg.
Solution:
mass (mg)= mass (lbs) × 453592.37 mg
mass (mg)= 162× 453592.37
mass(mg)= 73481963.94
or
mass= 7.348×10∧7 mg