Multiple choice

An element X has 7 electrons in its L shell. Which of the following statements are true about element X?

I. It belongs to period 9 of modern periodic table. II. Its atom contains 9 protons. III. It has a valency of 7. IV. Its atom can accept an electron to acquire noble gas configuration.

  1. I and II

  2. II and Ill

  3. III and IV

  4. Il and IV
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Element X, having atomic number 9, contains 9 protons and its valence shell contains 7 electrons. To acquire noble gas configuration, it can accept one electron.

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