Question

2
directions: select each correct answer. more than one answer may be correct.
which of the following statements about the elements in group 2 of the periodic table is true?

they all have two electrons in their outermost shell.

they all tend to become positive ions when they bond with other elements.

they all have similar chemical and physical properties.

they are all metals.

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Explanation:

Group 2 elements (alkaline earth metals) have 2 valence electrons. They lose these electrons to form +2 cations. Elements in the same group share similar valence electron configurations, leading to similar chemical/physical properties. Not all are metals? Correction: Group 2 elements are all metals (beryllium to radium), so all four? Wait, recheck: Group 2 elements are alkaline earth metals, all metals. Valence electrons: 2. Form cations by losing 2 electrons. Similar properties due to same valence shell electrons. So all four statements are true? Wait, original options: 1. 2 outer electrons (true). 2. Become positive ions (true, +2). 3. Similar properties (true). 4. All metals (true, Group 2 has no non-metals). So all four are correct.

Group 2 elements (alkaline earth metals) have 2 valence electrons, lose them to form +2 cations, share similar properties due to identical valence configurations, and are all metallic elements.

Answer:

They all have two electrons in their outermost shell., They all tend to become positive ions when they bond with other elements., They all have similar chemical and physical properties.