Group 2 (Alkaline Earth Metals)
Beryllium: 1s2 2s2
Magnesium: 1s2 2s2 2p6 3s2
Calcium: 1s2 2s2 2p6 3s2 3p6 4s2
Strontium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2
Barium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 6s2
Radium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4f14 4d10 4p6 5s2 5d10 5p6 6s2 6s2 6p6 7s2
Group 6A elements have a higher electronegativity and a greater tendency to gain electrons to achieve a stable octet configuration. In contrast, Group 2A elements have a lower electronegativity and typically lose electrons to form cations.
Group 2A elements (alkaline earth metals) tend to lose two electrons to form 2+ ions. This is because they have two valence electrons and tend to achieve a stable electron configuration similar to noble gases by losing those two electrons.
When Group 2A elements form ions they lose the electrons in their outer shell. In doing so they form positive ions known as cations.
There are six elements in group 2A A group is a vertical column. The group consists of Be , Mg, Ca ,Sr, Ba , and Ra.
Elements that have configuration of ns2np5 are members of the Halogen group(Group VIIA). They are, Fluorine, Bromine, Iodine and Astatine.
Group 6A elements have a higher electronegativity and a greater tendency to gain electrons to achieve a stable octet configuration. In contrast, Group 2A elements have a lower electronegativity and typically lose electrons to form cations.
loses 2 electrons to achieve a noble gas configuration
Group 2A elements (alkaline earth metals) tend to lose two electrons to form 2+ ions. This is because they have two valence electrons and tend to achieve a stable electron configuration similar to noble gases by losing those two electrons.
When Group 2A elements form ions they lose the electrons in their outer shell. In doing so they form positive ions known as cations.
There are six elements in group 2A A group is a vertical column. The group consists of Be , Mg, Ca ,Sr, Ba , and Ra.
Elements that have configuration of ns2np5 are members of the Halogen group(Group VIIA). They are, Fluorine, Bromine, Iodine and Astatine.
Group 2A * Known as Alkaline earth elements * All are metals * Occur only in compounds * React with oxygen in the general formula EO (where O is oxygen and E is Group 2A element)
All the elements in the same group have (usually) the same configuration of the valence electrons. For example, second-group elements (alkaline earth metals) all have ns2 configuration (where n=2-7). All halogens have ns2np5, etc. The similarity of electron configuration results in similarity of chemical properties.
Group 2A elements typically lose 2 electrons when forming ions.
Group 2A elements tend to GAIN electrons!!
Yes
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