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vampirchik [111]
3 years ago
7

The periodic table is divided into different blocks. Elements that have complete valence electron shells are mostly found in the

...
s block.
d block.
p block.
f block.
Chemistry
2 answers:
inn [45]3 years ago
7 0
Elements with complete electron shells are most likely noble gases which have 8 valence electrons in their outer shell. So the letter farthest to the right should be the correct answer. Noble gases are found in group 18
wolverine [178]3 years ago
3 0

<em>Answer:</em>

  • P Block

<em>Explanation:</em>

  • The p block elements involve group III A, IV A, V A, VI A , VII A and VIII A. But among these groups, there are only Nobel gases that have complete valence shell electrons.
  • The Nobel gases have their complete valence shell electrons due to which they are least reactive and stable one. They are found in VIIIA group of the periodic table at right side.

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a.

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Answer:

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Explanation:

From Fick's second law

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Where

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 C_0 is the initial temperature of the skin

  Cs is the temperature of the oven

 erf is a mathematical function known as error function

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From the question we are given that

            C_x  = 62°C

           C_0   = 33°C

            D   =  2.5 * 10^{-7} m^2/s.

Substituting values into equation one

                    \frac{62-33}{200-33} = 1 -erf [\frac{x}{2\sqrt{2.5*10^{-7}} *2} ]

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Hence

           erf(z) = 0.826

Looking at the table of error function shown on the first uploaded image

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                  \frac{z-0.95}{0.8260-0.8209}  = 1        

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 Substituting the value of z into equation 2

           0.96 = \frac{x}{1.414*10^{-3}}

             x   = 1.357*10^{-3}m

               

 

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