Question

In which group all the elements do not have same number of valence electrons..​

Answer 1

Answer:

• Within each column, or group, of the table, all the elements have the same number of valence electrons. This explains why all the elements in the same group have very similar chemical properties. For elements in groups 1–2 and 13–18, the number of valence electrons is easy to tell directly from the periodic table.
• In zero group, helium contains two electrons in the valence shell and the other elements , that is, neon to radon contain eight electrons in the valence shell

Answer 2

Answer:

In zero group, helium contains two electrons in the valence shell and the other elements , that is, neon to radon contain eight electrons in the valence shell

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