What is the valency of the group 2 and group 17 elements, respectively? [2 mark]

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Solution

Group 2 elements have 2 valence electrons. They can donate 2 electrons to make their octet complete. So, they have 2 valency. [1 mark]

Group 17 elements have 7 valence electrons. They can accept 1 electrons to make their octet complete. So, they have 1 valency. [1 mark]

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What is the valency of the group 2 and group 17 elements, respectively? [2 mark]

Group 2 elements have 2 valence electrons. They can donate 2 electrons to make their octet complete. So, they have 2 valency. [1 mark] Group 17 elements have 7 valence electrons. They can accept 1 electrons to make their octet complete. So, they have 1 valency. [1 mark]

Group 2 elements have 2 valence electrons. They can donate 2 electrons to make their octet complete. So, they have 2 valency. [1 mark]

Group 17 elements have 7 valence electrons. They can accept 1 electrons to make their octet complete. So, they have 1 valency. [1 mark]