Question

An element X has 7 electrons in its L shell. What is true about the 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 atoms can accept an electron to acquire noble gas configuration.

• A. (I) and (II)
• B. (II) and (Ill)
• C. (III) and (IV)
• D. (Il) and (IV)

Answer 1

The correct option is D

(Il) and (IV)

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