Question

what is the valency of the group 16 17 and 18th element. Explain with example​

Answer 1

Answer:

group 16 has its valency as 2

group 17 has its valency as 1

group 18 has its valency as 0

Explanation: Group 16 elements have 6 valence electrons, meaning that they require two more electrons to complete a stable electron octet

for eg- oxygen (group 16) has 6 valence and needs 2 more electrons to achieve the nearest noble gas configuration (for stability), which is neon.

group 17 elements have 7 valence electrons, meaning that they require one more electron to complete a stable electron octet

for eg - Chlorine (group 17)  has 7 valence and needs 1 more electron to achieve the nearest noble gas configuration (for stability), which is argon.

group 18 elements have 8 valence electrons, meaning that they have a stable electron octet

for eg - argon