What do all group 2 elements have in common? (2 points) they all gain two electrons to form a stable outer energy level. They form convalent bonds with halogens. They all react easily with the noble gases. They tend to form ionic bonds by losing electrons
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The property that is common to all group 2 elements is that they tend to form ionic bonds by losing electrons making these atoms positive charge. They are called cations. These elements are beryllium, magnesium, calcium, strontium, and radium.
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Electrons of same group show similar chemical and physical properties. Group-2 is the alkaline earth metals which have tendency to lose two electrons to form the M+2 types of metal ions as after losing two electrons they get the Noble gas configuration.
Since they tend to lose electrons therefore they will form ionic bond with non-metals and results to form the ionic compounds. Therefore the 4th option is correct here.
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