Elements P, Q, R and S have atomic numbers 11,15,17 and 18. Which of them are reactive non metals?
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Answers
Answer:
Q and R are reactive non-metals
Explanation:
They have 5 and 7 electrons in their valence shell respectively, so they readily accept 3 and 1 electron(s) in order to complete their octet and become stable.
Answer:
Q and R
Explanation:
We are given that elements P,Q ,R and S have atomic numbers 11,15,17 and 18.
We have to find reactive non metals in given elements.
We know that atomic number of sodium=11
Therefore, P is sodium.
Sodium is metal not non metal
We know that atomic number of phosphorus,P=15
Therefore, Q is phosphorus.
It is no metal because it is required 3 electrons to complete their octet.
Atomic number of chlorine =17
Therefore, element R is chlorine.
It is non metal it required one electron to complete their octet.
Atomic number of argon=18
Therefore, element S is argon.
It is noble gas because it has full filled configuration .It is non reactive because it does not required any electron to complete their octet.
Hence, Q and R are reactive non metals.