Question

arrangement sodium magnesium aluminium silicon and phosphorus in decreasing order of their atomic size​

Answer 1

Answer:

Atomic size decreases from going left to right in a period.

then

In the order of decreasing size...

Na>Mg>Al>Si>P

hope it helpes.......

mark brainliest

Answer 2

Sodium, magnesium, aluminium, silicon and phosphorus are arranged in decreasing order of their atomic size with reason mentioned below:

- Atomic radii decreases on moving from left to right within a period.

- This is caused due to electron shielding effect.

- when we move left to right in a period the attraction between the nucleus and the electron increases which increases the number of electrons and Hence, towards the nucleus shell shrinks.

- The number of protons also increases and one electron has lesser effect and that of the proton. Thus, nucleus pulls the electron towards it, resulting in smaller radii.

- The decreasing order of the atomic size are

Na > Mg > Al > Si > P.