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They are the alkaline metals.

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The Halogen family elements have how many valence electrons?

Halogen family members, or elements in group 17, have 7 valence electrons.


If the first energy level is complete with two electrons then what has two elements?

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 elements gain three electrons to fill its valence energy level?

When these elements have five electrons on the outermost shell of electrons.


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All elements except hydrogen have two electrons in the first energy level.


Electrons in wich energy level determines the chemical behavior of elements?

the outermost energy level! ( :


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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.


How many valence electrons does neon family have?

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.


How many electrons do beryllium and magnesium have in there outer energy levels?

Beryllium and magnesium have two electrons in their outermost energy level, as do all Group 2 elements.


Which elements have 3 energy levels with only 4 electrons in the last energy level?

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