āļ­āļ°āļ•āļ­āļĄāļŦāļĢāļ·āļ­āđ„āļ­āļ­āļ­āļ™ āļĄāļĩāļ­āļīāđ€āļĨāđ‡āļāļ•āļĢāļ­āļ™āļāļĩāđˆāļ•āļąāļ§

Answer and explanation

Correct answer: D.

  1. Step 1: āļˆāļģāļ™āļ§āļ™āļ­āļīāđ€āļĨāđ‡āļāļ•āļĢāļ­āļ™ .
  2. Step 2: āļˆāļķāļ‡āļĄāļĩ 10 āļ•āļąāļ§.
Answer
.
Why not the others: : āđ„āļĄāđˆāļ„āļīāļ”āļ›āļĢāļ°āļˆāļļāļ‚āļ­āļ‡āđ„āļ­āļ­āļ­āļ™. : āļ›āļĢāļąāļšāļ­āļīāđ€āļĨāđ‡āļāļ•āļĢāļ­āļ™āļœāļīāļ”āļ—āļīāļĻāļ—āļēāļ‡. : āļ•āļ­āļšāļˆāļģāļ™āļ§āļ™āļ™āļīāļ§āļ•āļĢāļ­āļ™.

Practise more āļ­āļ°āļ•āļ­āļĄāđāļĨāļ°āļ•āļēāļĢāļēāļ‡āļ˜āļēāļ•āļļ (Atoms and the Periodic Table).

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āļ­āļ°āļ•āļ­āļĄāļŦāļĢāļ·āļ­āđ„āļ­āļ­āļ­āļ™ 27 13 Al 3â€Ķ | O-NET (Thailand, Grade 12)