Question

Out of elements A,B,C with no.13,15,18 respectively which one will have the smallest atomic size and why ? Pls answer it correctly and with full responsibility. Thanks

Answer 1

The element with 18 as atomic number will have smaller atomic size this is because of increase in nuclear charge (i.e increase in electrons ) which tends to pull the electrons closer to the nucleus thus reducing the size of the atom!

Answer 2

Elements 13 is Aluminium (Al)

Element 15 is Phosphorus (P)

Element 18 is Argon (Ar)

Answer: All these 3 elements have 3 shells so number of shell isn't deciding factor.

Al has 3 electrons, P has 5 electrons and Ar has 8 electrons in outermost shell.

As , Argon has Highest number of Protons and Electrons , so Protons (18) will attract 18 electrons with more force than P(15) and Al(13) , This will make the Atomic Radius (size) of Argon , Element much smaller.

Mark it Brainliest please !