Question

Element A and B have atomic numbers 18 and 16 respectively.Which of these two would be more reactive and why?

Answer 1

Element having atomic number 16 will be more reactive as.it has valence electrons for reacting with other elements.
However,
The element having number 18 will not be having any valence electrons so it will not be able to react with any element.

Answer 2

The element with the atomic number 16 has higher reactivity than the element with the atomic number 18.

• The requirement for achieving a stable electronic state determines the atomic number's reactivity.
• Sulfur has 6 electrons in its outermost subshell, the M shell, and has the atomic number 16.
• The M shell, often known as the third shell, may house up to eight electrons at a time.
• As a result, atomic number 16 atoms will react with other elements to create a stable state configuration.
• Argon, on the other hand, has an atomic number of 18 and an M shell with 8 electrons in its outermost layer. As a result, it is inactive and unresponsive. As a result, the element with the atomic number 16 is more reactive.