Question

In: Chemistry

Write the electron configurations for the following atom and ion. (show full configuration.)


Write the electron configurations for the following atom and ion. (show full configuration.) 

(a) Mg2+ (Z=12, magnesium ion) 

(b) Sc (Z=21, scandium)

Solutions

Expert Solution

19)

(a) Mg2+

1s22s22p6

Mg have 12 electron (Z = 12)

but when Mg2+ formed Mg loose 2 electron and remain electron are 10 and electronic configuration as shown above.

(b) Sc

1s22s22p63s23p64s23d1

Scandium have 21 electron and its electronic configuration as shown above

electrons filled by increasing energy 3d have more energy than 4s electron therefore 4s subshell filled first then filled 3d subshell.

queen_honey_blossom answered 2 years ago
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