āļ­āļ°āļ•āļ­āļĄāļŦāļĢāļ·āļ­āđ„āļ­āļ­āļ­āļ™ āļĄāļĩāļ™āļīāļ§āļ•āļĢāļ­āļ™āļāļĩāđˆāļ•āļąāļ§

Answer and explanation

Correct answer: A.

  1. Step 1: āļˆāļģāļ™āļ§āļ™āļ™āļīāļ§āļ•āļĢāļ­āļ™ āļ‹āļķāđˆāļ‡āđ„āļĄāđˆāļ‚āļķāđ‰āļ™āļāļąāļšāļ›āļĢāļ°āļˆāļļ.
  2. Step 2: .
Answer
.
Why not the others: : āļ•āļ­āļšāđ€āļĨāļ‚āļĄāļ§āļĨāļ—āļąāđ‰āļ‡āļŦāļĄāļ”. : āļ•āļ­āļšāđ€āļĨāļ‚āļ­āļ°āļ•āļ­āļĄ. : āļšāļ§āļāđ€āļĨāļ‚āļĄāļ§āļĨāļāļąāļšāđ€āļĨāļ‚āļ­āļ°āļ•āļ­āļĄ.

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

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