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Seven
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What is the number of valance electrons in halogens?
Seven
What terms describe the most reactive nonmetals that have seven valance electrons?
Halogens
How many valance electrons does halogen have?
Halogens are group 17 elements. They have 7 valence electrons.
What group or family has elements with 7 valence electrons?
The family containing 7 valance electrons is called the Halogens. They are all called (in order of increasing valance electrons): Alkali Metals(1), Alkaline Earth Metals(2), Boron Group(3), Carbon Group(4), Nitrogen Group(5), Oxygen Group/Chalcogens(6), Halogens(7), and Noble Gasses(8/full).
Why are the halogens grouped together in a family?
As they all have seven electrons in their valance shell:- 9fluorine2, 717chlorine2, 8, 735bromine2, 8, 18, 753iodine2, 8, 18, 18, 785astatine2, 8, 18, 32, 18, 7 They all are electronegative too.
What is the reactivity for the halogens?
The reactivity of halogens decreases with increasing atomic number.
Which group 0 2 5 or 7 atoms electronic configuration 3s2 3p5?
Looks like seven valance electrons to me. that would make this group the halogens, 7A.
What are the names of the four elements of VII A group?
Group 7 elements are halogens. They have seven valance electrons& are highly reactive. They are: -Fluorine -Chlorine -Bromine -Iodine
How many valence electrons does an atom of any halogen have?
A halogen is located in group 17 of the periodic table, so the electron configuration for the valance electron would be ns2np5 (n=energy level). So all halogens have 7 valance electrons.
How can the number of valence electrons be determined from the periodic table?
By looking at the group number you can tell how many valance electrons there are ex: Group 1= 1 valance electrons Group 2-12= 2 valance electrons Group 13= 3 valance electrons Group 14= 4 valance electrons Group 15= 5 valance electrons Group 16= 6 valance electrons Group 17= 7 valance electrons Group 18= 8 valance electrons
What is the number of valance electrons in sodium?
one
What is the number of valance electrons for germanium?
4
