Valence Electrons(General Knowledge > General Science ) Questions and Answers

Question 1. How many valence electrons are found in atoms of Iodine?
  1.    4
  2.    7
  3.    9
  4.    1
Explanation:-
Answer: Option B. -> 7
Question 2. Which of these elements has 7 valence electrons?
  1.    bromine
  2.    boron
  3.    barium
  4.    bismuth
Explanation:-
Answer: Option A. -> bromine
Question 3. What is the goal of the Lewis Dot Structure?
  1.    To determine the electron position.
  2.    To show the element's valence electrons & bonding capabilities.
  3.    To find the atomic mass of an element.
  4.    To search for the number of electrons in an individual atom.
Explanation:-
Answer: Option B. -> To show the element's valence electrons & bonding capabilities.
Question 4. What groups are the most reactive non metals?
  1.    1 and 2
  2.    16 and 17
  3.    2 and 17
  4.    1 and 16
Explanation:-
Answer: Option B. -> 16 and 17
Question 5. Why are halogens so reactive?
  1.    They want to get rid of their only valance electron
  2.    They only need one more electron
  3.    They are non reactive, they have a full shell
  4.    None
Explanation:-
Answer: Option B. -> They only need one more electron
Question 6. How do electrons of an element determine that element's reactivity?
  1.    If the valence shell has missing electrons it is very reactive to attract or lose more electrons.
  2.    If the valence shell has a full ring of electrons it is very reactive because it needs more.
  3.    If the valence shell has a full shell of electrons it is very reactive because it is already full.
  4.    If the valence shell has missing electrons it is not reactive because it is missing electrons.
Explanation:-
Answer: Option A. -> If the valence shell has missing electrons it is very reactive to attract or lose more electrons.
Question 7. Which of the following statements describes group 2 of the periodic table?
  1.    Stable non-metals with 1 valence electron
  2.    Stable Metals with 2 valence electrons
  3.    Highly reactive non-metals with 1 valence electron.
  4.    Highly reactive metals with 2 valence electrons.
Explanation:-
Answer: Option D. -> Highly reactive metals with 2 valence electrons.
Question 8. All atoms are most stable with (or would "prefer") how many electrons in their valence shell?
  1.    1
  2.    2
  3.    8
  4.    18
Explanation:-
Answer: Option C. -> 8
Question 9. How many valence electrons are found in atoms of group 1?
  1.    7
  2.    6
  3.    4
  4.    1
Explanation:-
Answer: Option D. -> 1
Question 10. What electron configuration matches an oxygen atom?
  1.    1s22s22p63s2, 3p64s23d104p5
  2.    1s22s22p4
  3.    1s22s22p6
  4.    1s22s22p63s23p64s23d1
Explanation:-
Answer: Option B. -> 1s22s22p4
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