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Elements in the same group in the Table have the same outer electron configuration. For example, all Group I (alkali metal) elements have an ns1 valence electron configuration; likewise, Group II (alkaline earth) is ns2, Group VII (or 17, depending on how you number them, halogens) are ns2 np5, etc.

2007-04-28 04:31:36 · answer #1 · answered by TheOnlyBeldin 7 · 0 0

this backs to the atomic number(z).Members of the same group in the table have the same number of electrons in the outer most shells of their atoms and form bods of the same type . usually with the same valence. The noble gases with full outer shells generally do not form bonds.
but the columns are two types (A and B)there are 8 columns of the kind A and 8 of the kind B.
elements of the kind A are arranged by their outer (not outer most) shell and it is distinguished that the electron added (from an element to another )is added in the shells S,P. so the number of the electrons in the outer shell (not the main outer but the outer).and so is for the B but here the additional electron is added to the (D outer shell).

2007-04-28 05:20:26 · answer #2 · answered by hero yoy 1 · 0 0

The arrangement isn't the factor.
It's the number of electrons (the Atomic Number) that governs
the position in the Periodic Table of Elements.
e.g. Hydrogen is No. 1 as it has 1 electron.
Helium is No. 2 with 2 electrons.. etc...

2007-04-28 04:43:37 · answer #3 · answered by Norrie 7 · 0 1

Oxygen, Sulfur, Selenium, Tellurium, Polonium and ununhexium each and each have 6 valence electrons. so as which would be 6 aspects with 6 valence electrons. team sixteen aspects each and each have 6 valence electrons, in simple terms as team 17 aspects have 7 valence electrons and team 18 aspects have 8.

2016-12-28 03:31:22 · answer #4 · answered by ? 3 · 0 0

Answer should be in the first five pages of chapter one of most chemistry books.
Try reading yours.

2007-04-28 04:22:40 · answer #5 · answered by Anonymous · 0 0

The chemical makeup.

2007-04-28 04:17:20 · answer #6 · answered by wjm_53714 1 · 0 1

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