Complete the sentence Select all that apply The last element in periods 2-7 always has: the properties of a noble gas the lowest atomic mass because it is a gas five electrons in the outermost energy level eight electrons in the outermost energy level

Question

Complete the sentence Select all that apply The last element in periods 2-7 always has: the properties of a noble gas the lowest atomic mass because it is a gas five electrons in the outermost energy level eight electrons in the outermost energy level

Answer 1

The last element in periods 2-7 always has:- the properties of a noble gas- eight electrons in the outermost energy levelThese elements are known as noble gases, and they have a full valence shell with eight electrons (except for helium in period 1, which has two electrons). This configuration makes them very stable and unreactive.

Soru

Complete the sentence Select all that apply The last element in periods 2-7 always has: the properties of a noble gas the lowest atomic mass because it is a gas five electrons in the outermost energy level eight electrons in the outermost energy level

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