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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
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Which family of elements is characterized by an ns2 np5 valence configuration?
Elements that have configuration of ns2np5 are members of the Halogen group(Group VIIA). They are, Fluorine, Bromine, Iodine and Astatine.
How group 3A-7A differ from other group A elements?
Group 2A elements form compounds that are less soluble in water. Group 2A elements are harder. Group 2A elements have an additional valence electron. Group 2A elements are less reactive.
How many elements are in group 2A?
There are six elements in group 2A A group is a vertical column. The group consists of Be , Mg, Ca ,Sr, Ba , and Ra.
When group 2a elements form ions what happens?
When group 2A elements form ions, they lose two electrons. Some examples of group 2A elements include radium and magnesium.
Compared with Group 2A elements Group 6A elements have?
Do you own CA work!!
Which family of elements is characterized by an ns2 np5 valence configuration?
Elements that have configuration of ns2np5 are members of the Halogen group(Group VIIA). They are, Fluorine, Bromine, Iodine and Astatine.
Does group 2A elements lose or gain protons or electrons?
Group 2A elements tend to GAIN electrons!!
How group 3A-7A differ from other group A elements?
Group 2A elements form compounds that are less soluble in water. Group 2A elements are harder. Group 2A elements have an additional valence electron. Group 2A elements are less reactive.
How many elements are in group 2A?
There are six elements in group 2A A group is a vertical column. The group consists of Be , Mg, Ca ,Sr, Ba , and Ra.
When group 2a elements form ions what happens?
When group 2A elements form ions, they lose two electrons. Some examples of group 2A elements include radium and magnesium.
Compared with Group 2A elements Group 6A elements have?
Do you own CA work!!
What is similar about the electron shells as you look across a periods?
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.
What elements are in group 2a?
Beryllium, magnesium, calcium, strontium, barium and radium are the group IIA elements.
What does group 6A elements have compared to group 2A?
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)
Does group 2a elements lose two electrons?
Yes
How do 1A and 2A differ from the other group A elements?
bilat
What is the general valence shell configuration for the elements in group 7A?
Valence electron configuration in group 7A (halogens): ns2, np5 in which n=2, 3, 4, 5, ... etc. Starting with fluorine, F, electron configuration: (1s2), 2s2 2p5 (non valence electrons in () brackets)
