Question

what is magic no in chemistry and how it is used to write electronic configuration of elements? Please explain with some examples... ​

Answer 1

Answer:

The noble gases are helium, neon, argon, xenon and radon. The inertness of these elements is a consequence of the stability of the filled shells of electrons. The atomic numbers of the noble gases are 2, 10, 18, 36, 54 and 86. These can be considered magic numbers for electron structure stability.

Answer 2

Answer:

Step 1: Label your period table in blocks.

Step 2: Identify the element of interest on the periodic table and circle it.

Step 3: Locate hydrogen as your starting point.

Step 4: Glide across each row, left to right and top to bottom, writing out the electron configuration until you get to your element.

☛ Magic number, in physics, in the shell models of both atomic and nuclear structure, any of a series of numbers that connote stable structure. The magic numbers for atoms are 2, 10, 18, 36, 54, and 86, corresponding to the total number of electrons in filled electron shells.

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