It is because they are halogens
Fluorine is in group VII and period 2, element number 9.
Chlorine- Group VII- It has 7 valence electrons Group VII A- It does not lose electrons from its penultimate shell. Period 3- It has 17 electrons, therefore, electronic configuration is 2,8,7...3 shells
Helium has a full outmost valence shell. It is a nobel gas. it doesn't react with other chemicals. because the atomic number is 2 so it has to be in group 18 as it also has noble gases.
group 7 - halogens group 8 - noble gases
henry VII crown was put on his head by one of the stanley brothers.
The combining ratio for Group II elements with Group VII elements is 1:2. For example, calcium (Group II) will combine with chlorine (Group VII) to form calcium chloride with a ratio of 1 calcium atom to 2 chlorine atoms.
explain the full purpose of title VII of the civil rights act of 1964.
Henry VII
Group VII and Group 8 ( the noble gases)
Group VII, the Nitrogen Family
No, nitrogen does not belong to the halogen family. Nitrogen is a nonmetal and belongs to group 15 (or group V) of the periodic table, also known as the nitrogen group. The halogens are in group 17 (or group VII) of the periodic table.
No, it is in group 17. its actually in group 6 like u said, because 17 is the number of protons in chlorine.