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The electronic configurations of three e...

 The electronic configurations of three elements X, Y and Z are X 2, 8, Y-2, 8, 7 and Z- 2, 8, 2. Which of the following is correct?

A

X is a metal

B

Y is a metal

C

Z is a non-metal

D

Y is a non-metal and Z is a metal

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The correct Answer is:
To solve the question regarding the electronic configurations of elements X, Y, and Z, we will analyze each element step by step. ### Step 1: Write down the electronic configurations - Element X: 2, 8 - Element Y: 2, 8, 7 - Element Z: 2, 8, 2 ### Step 2: Analyze Element X - The electronic configuration of X is 2, 8. - This indicates that X has a complete outer shell (octet) with 8 electrons in the outermost shell. - Since it has a complete octet, it neither loses nor gains electrons. - Therefore, X can be classified as a noble gas. ### Step 3: Analyze Element Y - The electronic configuration of Y is 2, 8, 7. - This means Y has 7 electrons in its outermost shell. - To achieve a complete octet, Y needs to gain 1 electron. - The tendency to gain electrons is characteristic of non-metals. - Thus, Y is classified as a non-metal. ### Step 4: Analyze Element Z - The electronic configuration of Z is 2, 8, 2. - This indicates that Z has 2 electrons in its outermost shell. - To achieve a complete octet, Z needs to lose 2 electrons. - The tendency to lose electrons is characteristic of metals. - Therefore, Z is classified as a metal. ### Step 5: Conclusion - From the analysis: - X is a noble gas. - Y is a non-metal. - Z is a metal. - The correct statement is that Y is a non-metal and Z is a metal. ### Final Answer The correct option is: Y is a non-metal and Z is a metal. ---
To solve the question regarding the electronic configurations of elements X, Y, and Z, we will analyze each element step by step. ### Step 1: Write down the electronic configurations - Element X: 2, 8 - Element Y: 2, 8, 7 - Element Z: 2, 8, 2 ### Step 2: Analyze Element X ...
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