Question

What is the properties, electron configuration, orbirtal diagram and quantum numbers of last electron of the following elements:

*Lithium

*Aluminum

Answer 1

Electron Configuration;

Lithium

$[He]2s^1$

Aluminium

$Al:[Ne]3s^23p^1$

Lithium is a chemical element with symbol $Li$ and atomic number $3$ . Its atomic weight $=6.939amu$

Lithium in the periodic table;

Group ;1, Period; 2, Block ; s-block, Electron per shell; 2,1

Electron configuration using spdf notation

$1s^2\>2s^1$

Orbital diagram;

Four quantum numbers of the last electron of Lithium;

$n=2\>\>l=0\>\>m_{l}=0\>\>and\>\>m_s=+\frac{1}{2}$

Aluminum is a chemical element with a symbol $Al$ and atomic number $13$

Its atomic mass $=26.981539amu$

Aluminium in the periodic table

Group $3,$ Period $3,$ Block ; p-block

Electron per shell ; $2,8,3$

Electron configuration using spdf notation

$1s^2\>\>2s^2\>\>2p^6\>\>3s^2\>\>3p^1$

Orbital diagram

Four quantum number for the valence shell electron of aluminum is;

$n=3\>\>l=1\>\>m_l=-1\>\>m_s=+\frac{1}{2}$