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If by seven you mean 7A than the answer is both. 17 is the newer system which the scientific community was hoping to establish, which would get rid of the A and B classification. 7A is the older system in which all representative elements are given an A and transition metals are B.
What else can I help you with?
What is the group name for group 17 in periodic table?
Halogens!! :D its the most reactive nonmetal and has 7 valence electrons!
Which group of elements 7 valence electrons?
The groups of electrons with 7 valence electrons are groups 7 and 17 on the periodic table.
Where are the halgens located on the periodic table?
The halogens are located in Group 17 of the periodic table. They include elements such as fluorine, chlorine, bromine, iodine, and astatine. Halogens are highly reactive nonmetals with seven valence electrons.
What groups of nonmetal is most reactant?
Group 17 or 7-A, the halogens, are the most reactive non-metals.
How many valence electrons do elements group 17 have?
There are 7 valence electrons in elements of group-17. They are called halogens.
What is the group name for group 17 in periodic table?
Halogens!! :D its the most reactive nonmetal and has 7 valence electrons!
Which group of elements 7 valence electrons?
The groups of electrons with 7 valence electrons are groups 7 and 17 on the periodic table.
What is the group number for the halogen?
Halogens are group 17 on the periodic table.
Where are the halgens located on the periodic table?
The halogens are located in Group 17 of the periodic table. They include elements such as fluorine, chlorine, bromine, iodine, and astatine. Halogens are highly reactive nonmetals with seven valence electrons.
Which group in the periodic tables has 7 valence electrons?
group 17, halogens
In what group are elements extremely reactive nonmetal's?
Halogens, group 17 (7)
What groups of nonmetal is most reactant?
Group 17 or 7-A, the halogens, are the most reactive non-metals.
How many valence electrons do elements group 17 have?
There are 7 valence electrons in elements of group-17. They are called halogens.
What is another name for the group 17 elements?
Another name for Group 17 (VIIA) Elements is Halogens.
The most reactive group of nonmetals is the?
Group 17 (known as Halogens)
What is the group name and number of the most reactive nonmetals?
The halogens are the most reactive nonmetals. They belong to Group 17 on the periodic table.
What p block has 7 valence electrons?
The group 17 of p block has 7 valent electrons. These elements are called halogens.
