Multiple Choice
Which of the following statements accurately describes properties of valence electrons?
73
views
10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
Which of the following elements has the same number of valence electrons as krypton (Kr)?
A
Argon (Ar)
B
Sodium (Na)
C
Chlorine (Cl)
D
Neon (Ne)
Verified step by step guidance1
Identify the group number of krypton (Kr) in the periodic table. Krypton is a noble gas located in Group 18, which means it has a full outer shell of valence electrons.
Recall that elements in the same group have the same number of valence electrons. Since krypton is in Group 18, it has 8 valence electrons (except helium, which has 2).
Check the valence electrons of each given element by identifying their group numbers: Argon (Ar) is also in Group 18, Sodium (Na) is in Group 1, and Chlorine (Cl) is in Group 17.
Compare the valence electrons of each element to krypton's 8 valence electrons. Argon, being in Group 18, also has 8 valence electrons, while Sodium has 1 and Chlorine has 7.
Conclude that the element with the same number of valence electrons as krypton is Argon (Ar), not Neon (Ne), which is also a noble gas with 8 valence electrons but was not listed as an option.
Related Videos
Related Practice
