Orbitals and Placing Electrons to Orbitals with Examples

Orbitals and Placing Electrons to Orbitals with Examples

When external energy is given to atoms, some of them change their energy levels. We call this state of atom as; exited state. For example, following electron configurations belong to 8O, one of them is ground state and other one is exited state.

1s22s22p4 : "ground state"

1s22s22p33s1 : "exited state"

Elements are in ground states most of the time. When we solve examples you should always take them in ground state.

Showing Electrons in Orbitals (sub shells)

We show orbitals with following shape;

orbitals electrons





Capacity of each orbital is two electrons. We can also show electrons in orbitals as follows ;

orbitals electrons2





There are some rules for placing electrons in orbitals. For example, electrons must be placed orbitals having same energy level one by one. If orbitals are not filled with electrons, you can not pass another energy level. Look at the following figure that shows number of orbitals in each sub level s, p, d, f;

orbitals electrons3













Examine following examples to understand placing electrons in orbitals.

1. 5B: 1s22s22p1

orbitals example1





2. 6C: 1s22s22p2

orbitals example2





3. 7N: 1s22s22p3

orbitals example3





4. 8O: 1s22s22p4

orbitals example





Spherical Symmetry

Spherical symmetry makes atom more stable. Half filled or filled orbitals show us spherical symmetry.

s : 1e- or 2e-

p : 3e- or 6e-

d : 5e- or 10e-

f: 7e- or 14e-

Orbitals s, p, d, f have given electrons above, has spherical symmetry.

7N=1s22s22p3 p orbital has 3 electrons, thus N has spherical symmetry.

8O=1s22s22p4 p orbital has 4 electrons, thus O has NO spherical symmetry.

Electron Configurations of Ions

If  electron is bound to neutral atom, atom becomes negatively charged ion. We calculate total number of electrons and make electron configuration.

Example: Write electron configuration of  9F-.

F ion has 9+1=10 electrons.


If electron gives electron it becomes positively charged ion.

Example: Write electron configuration of  14Si+. 14Si+2, 14Si+3 .

14Si+ has 14-1=13 electrons


14Si+2 has 14-2=12 electrons


14Si+3 has 14-3=11 electrons



Atomic Structure Exams and  Problem Solutions



sphyrical symetry chemistry
electron configuration of 14Si
spherical symmety chemistry
examples of electrons
electronic orbitals, spherical symmetry
rules for placing electrons in orbitals
placing electrons in orbitals
examples of with 13 electrons
tutorial on orbitals in chemistry 1
rules for placing electronics in their orbitals
what is the electron configuration of 14Si
orbitals and examples(chemistry)
what are the rule for placing electrons into energy level?
placing electrons in orbits
orbitals with examples
spherical symmetry chemistry
online tutorial on electronic configuration
rules for placing atoms
placing electrons in atoms
examples of ground state-chemistry
rule for placing electrons
electrons in orbitals tutorial
electrons in orbitals
filled p orbital spherically symmetric
orbital 14si
is ground state always spherical electron distribution
Placing Electrons into Orbitals
rules for placing electron in energy levels
placing electrons and orbitals
grounding always takes electrons
chemistry orbitals ground state
spherical symmatry chemistry
why the half-shaped orbitals are most stable?
main energy level sub tares and orbital
placing of electrons
orbital symmetry chemical reactions problem sheets
electron example and rules
orbitals of electrons
orbitals electrons
half filled orbital
half filled d orbitals
spherical configuration of atoms
Orbitals and Placing Electrons to Orbitals with Examples
rules for placing electrons
spherically symmetric electron configuration
orbitals s, p, d, and f
A level how orbitals are filled in F- ion
orbitals p and s levels
state the rules for placing into their orbitals
placing electrons