Question

please refer the attachment

fill in the blank​

Answer 1

Explanation:

These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical reactivity. The six noble gases that occur naturally are helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).

Answer 2

Answer: 8 electrons
Helium has only 2 electrons.

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