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Elements with five or more electrons in the outer energy level are typically classified as nonmetals. These elements tend to gain electrons to achieve a stable octet configuration. Examples include nitrogen, oxygen, and chlorine.
When these elements have five electrons on the outermost shell of electrons.
Elements with one to two electrons in the outer energy level are typically the alkali metals (group 1) and alkaline earth metals (group 2) on the periodic table. These elements are highly reactive due to their tendency to lose these outer electrons to achieve a stable electron configuration. Examples include lithium, sodium, and beryllium.
halogens (group 17 elements)
False. An element's reactivity is determined by the number of electrons in its outermost energy level, rather than the number of protons in its nucleus. Elements with fewer electrons in their outer shell are more likely to react with other elements in an effort to achieve a stable electron configuration.
Elements with five or more electrons in the outer energy level are typically classified as nonmetals. These elements tend to gain electrons to achieve a stable octet configuration. Examples include nitrogen, oxygen, and chlorine.
Elements form ionic bonds when they transfer electrons to achieve a stable octet in their outermost energy level. Covalent bonds are formed when elements share electrons to achieve a complete outer energy level. The type of bond formed depends on the electronegativity difference between the atoms involved.
Elements with atomic numbers higher than 10 generally do not have 8 electrons in their outermost energy level. These elements tend to follow the octet rule, where they aim to have 8 electrons in their outer shell to achieve stability. Exceptions include elements such as transition metals that can have variable oxidation states.
When these elements have five electrons on the outermost shell of electrons.
Group I (alkali metals) and Group II (alkaline earth metals) elements on the periodic table are more likely to give away electrons to form positive ions. These elements have one or two electrons in their outermost energy level, making it easier for them to lose these electrons and achieve a stable electron configuration.
An element's combining ability is determined by its valence electrons, which are the electrons in the outermost energy level. Elements with few valence electrons tend to lose or share electrons in chemical reactions, while elements with many valence electrons tend to gain or share electrons. This behavior allows elements to form chemical bonds and combine with other elements to achieve a more stable electron configuration.
Group IVA elements can typically accept or lose 4 electrons to achieve a stable electron configuration. This is because they have 4 valence electrons in their outer energy level.
Group 7A elements have 7 electrons in their valence level, while Group 7B elements have 17 electrons in their valence level. This difference occurs because elements in Group 7A have 7 valence electrons, while elements in Group 7B have 7 valence electrons plus the 10 additional electrons in the d sublevel which contributes to a total of 17 valence electrons.
Elements with one to two electrons in the outer energy level are typically the alkali metals (group 1) and alkaline earth metals (group 2) on the periodic table. These elements are highly reactive due to their tendency to lose these outer electrons to achieve a stable electron configuration. Examples include lithium, sodium, and beryllium.
Elements in the same group have the same number of 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.
Most elements require 8 electrons in their outer energy level to be stable, except for hydrogen and helium which require only 2. This is known as the octet rule, where atoms tend to gain, lose, or share electrons to achieve a full outer energy level of 8 electrons.