Question

Which element has a complete valence electron shell?

Answer 1

Answer:

Group 18 elements (helium, neon, and argon are shown) have a full outer, or valence, shell. A full valence shell is the most stable electron configuration. Elements in other groups have partially-filled valence shells and gain or lose electrons to achieve a stable electron configuration.

Answer 2

The Element which has a complete valence electron shell is Helium.

• The valence shell of helium is complete. Its headmost and sole shell, 1n, has two electrons. Similarly, neon has an eight-electrons-per-shell outer 2n shell.
• Helium and neon are extremely stable due to their electron structures. Even though argon doesn't have a complete outer shell, seeing that the 3n shell may carry over eighteen electrons, it is strong like helium and neon as the 3n shell has eight electrons and so meets the octet rule.
• In their neutral, non-charged state, helium and hydrogen are the solitary two elements with electrons solely in the 1s1s1, s orbital.
• The outer electron shells of neon (Ne), helium (He), and argon (Ar) as, all bunch 18 elements, are full or meet the octet rule. As a result, they are extremely stable as single atoms. They are described as inert gases or noble gases because of their non-reactivity.