Question

how many electrons do elements in groups 14 and 17 need to gain to achieve a stable configuration?

○ elements in group 14 need to gain 4 electrons and elements in group 17 need to lose 1 electron.

○ none of these answer choices are correct.

○ elements in group 14 need to lose 4 electrons and elements in group 17 need to lose 1 electron.

○ elements in group 14 need to gain 4 electrons and elements in group 17 need to gain 1 electron.

○ elements in group 14 need to lose 4 electrons and elements in group 17 need to gain 1 electron.

Explanation:

Step1: Recall group and valence electrons

Group 14 elements have 4 valence electrons. To achieve a stable octet (8 electrons in outer shell, or 2 for He), they can gain 4 electrons (since losing 4 is also possible, but for non - metals in group 14, gaining is a way, and for the context of the question's options, we analyze the need to gain). Group 17 elements have 7 valence electrons. To achieve a stable octet, they need to gain 1 electron (because 7 + 1=8).

Step2: Analyze each option

• Option 1: Says group 17 needs to lose 1 electron. But group 17 has 7 valence electrons, losing 1 would give 6, not stable. So wrong.
• Option 2: We will see that one of the options is correct, so this is wrong.
• Option 3: Group 14 losing 4 and group 17 losing 1. Group 17 losing 1 is wrong as explained.
• Option 4: Group 14 gain 4 (to reach 8 valence electrons) and group 17 gain 1 (7 + 1 = 8). This matches the electron - gaining requirements for stable configuration.
• Option 5: Group 14 losing 4. While group 14 can lose 4, the question is about gaining. And group 17 gaining 1 is correct, but group 14 part is wrong.

Answer:

Elements in group 14 need to gain 4 electrons and elements in group 17 need to gain 1 electron.