hey ❕
help me in these questions 〰️
⏩️what is covalency❓
⏩️Helium has two electrons in its valence shell but its valency is not 2 explain .why❓
give best answer ✔️✔️
Answers
Answered by
2
Hey❕
Here is the answer of your question ⬇️⬇️
⏩ The number of bonds an atom can form within a molecule is called covalency.
⏩ This is due to electronic configuration of elements. The valency of an element is calculated by electronic configuration.
There is one method for class 9th and 10th.
K L M N
2 8 18 32
It differs wth different elements. It is possible for only first 20 elements basically. An element should have 2 electrons in th first shell and 8 in the remaining. It is compulsory.
So, in the case of Helium:
e.c.=2
So, the first shell is filled.
Thus Helium doesn't have 2 valency.
It is a noble gas.
HOPE IT HELPS YOU MATE
PLEASE MARK ME AS BRAINLIEST
Here is the answer of your question ⬇️⬇️
⏩ The number of bonds an atom can form within a molecule is called covalency.
⏩ This is due to electronic configuration of elements. The valency of an element is calculated by electronic configuration.
There is one method for class 9th and 10th.
K L M N
2 8 18 32
It differs wth different elements. It is possible for only first 20 elements basically. An element should have 2 electrons in th first shell and 8 in the remaining. It is compulsory.
So, in the case of Helium:
e.c.=2
So, the first shell is filled.
Thus Helium doesn't have 2 valency.
It is a noble gas.
HOPE IT HELPS YOU MATE
PLEASE MARK ME AS BRAINLIEST
Answered by
0
helium is a stable atom, because the first shell takes 2 and the second 8 etc
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