Question

Elements P and Q have atomic numbers 13 & 15 respectively. Which of the following statements is correct? * 1 point P has a tendency to lose 3 electrons. Q has a tendency to gain 3 electrons. The formula of the compound formed by them is PQ All statements are correct.

Answer 1

Answer:

all statements are correct

Explanation:

1) electronic configuration of p is 2,8,3.

              therefore it can easily lose 2 electrons to attain noble gas configuration of neon(2,8)

2) electronic configuration of Q is 2,8,5

                here Q can gain 3 electrons easily to attain noble gas configuration of argon(2,8,8) instead of losing 5 electrons

3) valency of P : 3  

   valency of Q : 3

 the compound formed will be P₃Q₃

on simplifying we get PQ

so all the statements are correct

hope it helps

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Answer 2

CORRECT QUESTION

Elements P and Q have atomic numbers 13 & 15 respectively.

Which of the following statements is correct? *

(a)P has a tendency to lose 3 electrons.

(b)Q has a tendency to gain 3 electrons.

(c)The formula of the compound formed by them is PQ

(d)All statements are correct.

ANSWER

The correct option is (d) All statements are correct.

EXPLANATION:

• Atoms of elements gain or lose electrons to attain stability for doing so, the last valence shell should have 2 or 8 electrons.
• The atomic number of Element P is 13. The electronic configuration is - 2, 8, 3. So to complete its octet and gain stability. Element P has a tendency to lose 3 electrons.
• Hence statement (a) is correct
• The atomic number of Element Q is 15. The electronic configuration is - 2,8,5.
• So to complete its octet, Element P will have a tendency to gain 3 electrons.
• Hence, Statement (b) is correct.
• The valency of P is + 3 and the valency of Q is -3.
• To write the chemical formula the valencies are swapped and are written in the subscript of elements formula.
• Hence, The chemical formula is - P₃Q₃
• On further simplification, the formula of the compound formed is - PQ
• Hence, this statement is also correct.

• Since all the statements are correct the correct option will be option(d) All Answers are correct.

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