Two valence electrons
all the elemants have valence electrons the last number of the elecotrons is the elemets valence electrons
The groups of electrons with 7 valence electrons are groups 7 and 17 on the periodic table.
As,Arsenic belongs to nitrogen family in periodic table so it has 5 valence electrons.
the number of valence electrons increases on moving from left to right in periodic table.Group 1 has 1 valence electron and group-18 has 8 valence electrons.
Strontium has 2 valence electrons because it is part of the Alkaline Earth Metals or Group 2 of the periodic table which all have 2 valence electrons
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Valence electrons
all the elemants have valence electrons the last number of the elecotrons is the elemets valence electrons
The groups of electrons with 7 valence electrons are groups 7 and 17 on the periodic table.
As is present in group-15. It has 5 valence electrons.
As,Arsenic belongs to nitrogen family in periodic table so it has 5 valence electrons.
halogens
the number of valence electrons increases on moving from left to right in periodic table.Group 1 has 1 valence electron and group-18 has 8 valence electrons.
group 13 period 4
One valence electron.
it has one valence electron
Barium has two valence electrons, as can be deduced from its placement in Group 2 of the modern periodic table.