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Troyanec [42]
3 years ago
8

Choose the ground state electron configuration for Cr3+.

Chemistry
1 answer:
alukav5142 [94]3 years ago
5 0

Answer:

b) [Ar]4s²3d1¹

Explanation:

Chromium, Cr, is the atom with atomic number 24 (That is, 24 protons).

A Cr³⁺ contains 3 electrons less than number of protons. That is 21electrons.

The Argon, Ar, contains 18 electrons. That means the electronic configuration of Cr³⁺ contains 3 electrons more than Ar.

Following the Hund's rule, these three electrons will occupy the 4S orbital (2 electrons) and the 2d orbital (1 electron).  

Thus, right solution is:

<h3>b) [Ar]4s²3d1¹</h3>

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in 1965, the mean price of a new car was $2,650 and the standard deviation was $1,000. In 2011, the mean was $30,500 and the sta
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Answer:

Car were more expensive in 2011

Explanation:

Data provided in the question:

Mean price of the car in 1965 = $2,650

Standard deviation, s = $1,000

Mean price of the car in 2011 = $30,500

Standard deviation in 2011, s = $9,000

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Cost in 2011 = $28,000

Now,

z score = [ X - mean ] ÷ s

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In 1965

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In 2011

z score = [ $28,000 - $30,500 ] ÷ 9,000

= -0.278

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The standard score in 2011 is higher than in 1965

Hence,

Car were more expensive in 2011

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3 years ago
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Ans

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