What is the name of the group of elements that are unreactive gases? actinides series halogen gases lanthanide series noble gases

Option (d) is the correct answer.

Explanation:

Noble gases are the gases of group 18 which are helium, neon, argon, krypton, xenon and radon.

For example, electronic configuration of neon is

These elements have completely filled shells so, they do not need to gain or lose an electron as they are stabilized.

As a result, noble gases become unreactive in nature.

Thus. we can conclude that noble gases is the name of the group of elements that are unreactive gases.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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