They are the alkaline metals.
Halogen family members, or elements in group 17, have 7 valence electrons.
If the first energy level is complete with two electrons, then the elements hydrogen and helium have two elements in their electron configuration. Hydrogen has one electron in its first energy level, while helium has two electrons filling its first energy level.
Group 8A elements have 8 valence electrons. This means that the highest occupied energy level in Group 8A elements will have 8 electrons, as the maximum number of electrons in an energy level is 8 based on the octet rule.
The neon family, also known as Group 18 on the periodic table, contains elements with 8 valence electrons. This includes elements such as helium, neon, argon, krypton, xenon, and radon. Valence electrons are the electrons in the outermost energy level of an atom.
Beryllium and magnesium have two electrons in their outermost energy level, as do all Group 2 elements.
Halogen family members, or elements in group 17, have 7 valence electrons.
If the first energy level is complete with two electrons, then the elements hydrogen and helium have two elements in their electron configuration. Hydrogen has one electron in its first energy level, while helium has two electrons filling its first energy level.
When these elements have five electrons on the outermost shell of electrons.
All elements except hydrogen have two electrons in the first energy level.
the outermost energy level! ( :
Group 8A elements have 8 valence electrons. This means that the highest occupied energy level in Group 8A elements will have 8 electrons, as the maximum number of electrons in an energy level is 8 based on the octet rule.
The neon family, also known as Group 18 on the periodic table, contains elements with 8 valence electrons. This includes elements such as helium, neon, argon, krypton, xenon, and radon. Valence electrons are the electrons in the outermost energy level of an atom.
Beryllium and magnesium have two electrons in their outermost energy level, as do all Group 2 elements.
oxygen
Elements within the same period have the their valence electrons in the same principle energy level. For example, those elements in period 2, have their valence electrons in the 2nd energy level.
7 electrons would be in the highest occupied energy level of a 7A element. Group 7A elements have 7 valence electrons, which occupy the highest energy level of the atom.
The number of electrons in the highest occupied energy level of an element in Group 15 is 5. Group 15 elements have 5 valence electrons, which occupy the highest energy level.