Question

7 based on the periodic table, which of the following propositions is most accurate regarding the properties of the elements in the halogen family? halogens have a single valence electron and are highly reactive with metals to form alkaline solutions. halogens have seven valence electrons and are highly reactive, especially with alkali metals, to form salts. halogens have two valence electrons and are generally non - reactive, often existing as noble gases. halogens have a complete outer shell of valence electrons and do not easily form compounds with other elements.

Explanation:

• Analyze each option:
• Halogens are in group 17, so they have 7 valence electrons (not 1, 2, or a complete shell).
• Halogens are highly reactive, especially with alkali metals (group 1) to form salts (like NaCl).
• The first option is wrong (1 valence electron), third (2 valence, non - reactive, noble gases) is wrong (noble gases are group 18), fourth (complete shell, non - reactive) is wrong (noble gases have complete shells). But the question asks for the inaccurate statement? Wait, no, wait the options: Wait, the correct property is halogens have 7 valence electrons, are reactive, form salts with alkali metals. So the inaccurate ones are the others. But let's check each:
• Option 1: Halogens have 7 valence electrons, not 1. So this is inaccurate. But wait, the second option says "Halogens have seven valence electrons and are highly reactive, especially with alkali metals, to form salts." which is correct. So the inaccurate ones are the first, third, fourth. But maybe the question is which is the accurate one? Wait, the original question: "which of the following statements is MOST accurate" (maybe typo, but looking at the options, the second option is correct. Wait, let's re - check:
• Halogens (group 17) have 7 valence electrons. They are highly reactive, and react with alkali metals (group 1) to form ionic salts (like NaF, KCl etc.).
• First option: 1 valence electron is wrong (alkali metals have 1).
• Third option: 2 valence electrons (alkaline earth metals have 2), and halogens are reactive, not non - reactive like noble gases.
• Fourth option: Complete outer shell is noble gases (group 18), halogens need 1 electron to complete, so they are reactive.
• So the second option is the accurate one.

Answer:

B. Halogens have seven valence electrons and are highly reactive, especially with alkali metals, to form salts.