Explanation:
An atom undergoes alpha decay by losing a helium atom.
So when bismuth undergoes alpha decay, we have;
²¹⁰₈₃Bi --> ⁴₂He + X
Mass number;
210 = 4 + x
x = 206
Atomic number;
83 = 2 + x
x = 81
The element is Thallium. The symbol is Ti.
For the second part;
X --> ⁴₂He + ²³⁴₉₀Th
Mass number;
x = 4 + 234 = 238
Atomic Number;
x = 2 + 90 = 92
The balanced nuclear equation is;
²³⁸₉₂U --> ⁴₂He + ²³⁴₉₀Th
On one end of the electromagnetic spectrum are radio waves, which have wavelengths billions of times longer than those of visible light. On the other end of the spectrum are gamma rays, with wavelengths billions of times smaller than those of visible light.
+2, because Beryllium is in the Group II of the periodic table.
Hope this helps!
Normally for these types of questions (2 different situations), you can use:
P*V/T = P*V/T
As long as you don't confuse the different values up
Since V is constant, you can say that P/T (before heating up) = P/T (after heating up)
So 75000/295 = P/418
An experiment because you need to change variables to get different outcomes and that is in an experiment
