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An Element Has Its Electron Configuration as 2,8,2. Now Answer the Following Questions. - Science and Technology 1

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An element has its electron configuration as 2,8,2. Now answer the following questions.
i. What is the atomic number of this element?
ii. What is the valency of this element?
iii. What is the group of this element?
iv. To which period does this element belong?
v. With which of the following elements would this element resemble?

`_7N ,  _4Be  ,  _18Ar  , _17CL`

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Solution

i. Atomic number 12 
ii. Valency 2 
iii. Group 2 
iv. Period 3

v. 4Be

Concept: Modern Periodic Table and Electronic Configuration of Elements
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