Question

Consider five elements:- 'V', 'W', 'X', 'Y' and 'Z' having atomic number 10, 20, 30, 40 and 50, respectively.

Which of these is/are non-metals?

• A. ‘V’ and ‘Y’
• B. ‘Y’ only
• C. ‘V’ only
• D. ‘Y’ and ‘Z’

Answer 1

The correct option is C

‘V’ only

According to the assigned atomic number, the elements are

• V: Neon (atomic number $=10$)
• W: Calcium (atomic number $=20$)
• X: Zinc (atomic number $=30$)
• Y: Zirconium (atomic number $=40$)
• Z: Tin (atomic number $=50$)

The amphoteric line of the periodic table divides the metals from the non-mentals. The elements on the left of the line are metals and the elements on the right are the non-metals.

According to the above concept,

Element V lies on the right side of the line.

So, only V is non-metal.