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Three elements P, Q and R have consecuti...

Three elements `P, Q` and `R` have consecutive increasing atomic numbers. If `Q` is a noble gas of second period then which of the following is correct about `P` and `R` ?

A

`P` and `R` belong to the same period of the periodic table.

B

`P` is a non-metal while `R` is a metal.

C

`P` and `R` belong to same group of the periodic table.

D

None of these

Text Solution

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The correct Answer is:
To solve the problem regarding the elements P, Q, and R with consecutive increasing atomic numbers, where Q is a noble gas in the second period, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Noble Gas in the Second Period**: - The noble gas in the second period is Neon (Ne), which has an atomic number of 10. 2. **Determine the Atomic Numbers of P and R**: - Since P, Q, and R have consecutive atomic numbers and Q is Neon (10), we can deduce: - P (atomic number 9) is Fluorine (F). - R (atomic number 11) is Sodium (Na). 3. **Classify the Elements**: - Fluorine (P) is a non-metal. - Sodium (R) is an alkali metal. 4. **Determine the Periods of P and R**: - Fluorine (P) is in the second period. - Sodium (R) is in the third period. 5. **Conclusion about P and R**: - P (Fluorine) is a non-metal, while R (Sodium) is a metal. - They do not belong to the same period or group. ### Final Statements: - P is a non-metal. - R is a metal. - They belong to different periods.
To solve the problem regarding the elements P, Q, and R with consecutive increasing atomic numbers, where Q is a noble gas in the second period, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Noble Gas in the Second Period**: - The noble gas in the second period is Neon (Ne), which has an atomic number of 10. 2. **Determine the Atomic Numbers of P and R**: ...
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