Answer:
Its D. have the same compostion
Explanation:
Dont haveaan explation i got it wrong and the real answer popped up
The notation is actually written in this way (shown in the attached picture). The X is the symbol of the element. So, for potassium, the symbol is K. The A represents the mass number of the isotope. In this case, that would be equal to 39. The Z represents the atomic number of potassium, which is 19. Therefore, the symbol for the isotope is:
³⁹₁₉K
The correct option is ARGON.
To quickly find out the element that is been described by the electronic configuration, write down and add together all the index figures in the electronic configuration. The index figures in the above electronic configuration are 2, 2, 6, 2 and 6. If you add all these figures together, you will get 18 and the element that has the atomic number of 18 is argon.
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is directly related to the ideal gas law.
The ideal gas law states that:

. Rewriting this gives:

. R is the universal gas constant, so its value is fixed. For a given sample, n is the number of moles of the gas, so its value would be fixed too. This means that the value of

would be a fixed constant as well. Therefore, whatever the initial value

is, it should be equal to the final value

.</span>