18. Valence shell and Valence electrons

What is the valence shell?

The outermost electron shell of an atom.

Why is the valence shell important?

It contains valence electrons, which determine chemical bonding and reactivity.

What are valence electrons?

Electrons in the valence shell involved in chemical bonding.

How can you determine the number of valence electrons?

From the electron configuration or the element’s group number on the periodic table.

What is the role of valence electrons in chemical reactions?

They are involved in forming bonds and achieving stable electron configurations.

How many valence electrons does hydrogen have?

1 valence electron.

How many valence electrons does carbon have?

4 valence electrons.

What is the octet rule?

Atoms gain, lose, or share electrons to achieve 8 electrons in their valence shell.

How many valence electrons does neon have?

8 valence electrons.