Question

Helium is considered a noble gas because it has a _blank___ valence electron shell

Answer 1

helium has completely filled valence orbitals similar to that of noble gases and is chemically inert at room temperature.

Answer 2

Helium has a full valency electron shell

Step-by-step explanation:

Noble gases are gases at in general they don't react with any other element easily. They are a group of elements that make up Group 18 on the periodic table. They are referred to as inert gases because of their unreactive nature because they have a full valency electron shell. They have the following general properties: colourless, odourless, tasteless, and are nonflammable gases.