Neutrons were discovered by James Chadwick<span> in 1932, when he demonstrated that penetrating radiation incorporated beams of neutral particles. Neutrons are located in the nucleus with the protons. Along with protons, they make up almost all of the mass of the </span>atom<span>.
Hope this helps. </span>
<span>No, xenon will not react on Nitrogen because xenon
only reacts with oxygen and fluorine. Xenon only reacts with the 2 elements
because these 2 elements contain a strong electronegative element which is high
in energy barrier that can move the electrons inside xenon elements. Xenon is an element with a symbol of Xe, it
is odorless and colorless gas. Common uses of xenon are flash lamps and arc
lamps. Xenon is a luminous element, it glows when placed near to high voltage
electric field.
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The tshirt that is going to absorb most amount of sunlight is the black t-shirt. This is because its reflectivity is almost zero that it is not capable of reflecting back the light to the surface. This is the very reason why we are feeling so warm when we wear a black t-shirt.
Step first:
Since, 78.0 percent 
by volume is present in the air which implies there are 78 moles of present in 100 moles of air.
Now,
Mole fraction of = 
Mole fraction =
= 0.78
Partial pressure is equal to the multiplication of total pressure and mole fraction.
Partial pressure = 
(as 1 atm is atmospheric pressure)
= 0.78 atm.
Step second:
Henry's law constant is calculated by:
where,
is solubility of gas
is partial pressure of gas
is henry's law constant
Substitute the value of solubility and partial pressure to find the value of Henry's law constant in above formula:
k = 
= 
Thus, Henry's Law constant is 
.
