I read somewhere that boron is more metallic. Is it correct? If so, can you please elaborate?

The reason why I'm confused is because 2 factors come into play here:

  1. When you move towards right, metallic character decreases.
  2. When you move downwards, metallic character increases.

So, which one would win? Are there any exception cases I should look out for?

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    $\begingroup$ Welcome to Chemistry.SE! We have a site policy for homework questions which can also apply to self-study questions. Please edit your question to include your thoughts, where you got stuck, and let us know where you're finding difficulty so we may best help you. $\endgroup$ – Melanie Shebel May 19 '19 at 5:51
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    $\begingroup$ It's either metallic or it isn't. "More metallic" makes no sense. Both are non-metals. $\endgroup$ – Ian Bush May 19 '19 at 19:51
  • $\begingroup$ @IanBush, not nonmetals but semimetal, semiconductor or metalloid! See en.wikipedia.org/wiki/Metalloid $\endgroup$ – DrMoishe Pippik May 20 '19 at 21:46
  • $\begingroup$ Both Boron and Silicon in their standard forms at STP have a band gap. As such. they are non-metals. As the link provided says "No widely accepted definition of a metalloid exists", as such I don't think it is a useful term. Semimetal, with a positive direct band gap but negative indirect one, is of some use but not relevant here. $\endgroup$ – Ian Bush May 20 '19 at 22:06

Since both are metaloids, or semiconductors, look for the criteria that define them. In particular, electronegativity or ionization energy are important.


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