How do I draw an atom?

Question

Exs: H2O, CO2, O2, H2, NH3.
I also don't understand the 2,8,8 rule.

Answer 1

Atom is composed of proton, neutron and electron.
Neutron has no charge, proton has positive charge while electron has negative charge. electrons orbit proton and neutron at centre. In 2, 8, 8 rule, the first orbit has maximum 2 electrons moving around. The second orbit has maximum 8 electrons moving around. The third orbit has maximum 8 electrons moving around. The fourth orbit has maximum 16 electrons moving around...
H has one electron. So ,H has only one orbit
O has 8 electrons. 2 at inner orbit and 6 at outer orbit.
C has 6 electrons. 2 at inner orbit and 4 at outer orbit.
N has 7 electrons. 2 at inner orbit and 5 at outer orbit.
You can draw atom with inner and outer orbit surrounding by electrons

For molecular structure, the drawing should show the bonding between atoms. The bonding only happen at outer orbit to fill up maximum electrons in that orbit.

1)H2O

H
:
O ::
:
H


2) CO2

:: O :: C :: O ::

3) O2

:: O :: O ::

4) H2

H : H

5) NH3

H
:
:N : H
:
H

Answer 2

Protons and neutrons are in the neucleus, electrons orbit the neucleus. On the first shell there are 2 electrons that are orbating the necleus because that is just the rule other the rest of the shells there are eight, ex: shell number 1,2,3,4,5,....

H2O: It is atoms that bonded with each other making a molecule... the molecule looks like this:

http://www.geo.lsa.umich.edu/classes/geo222/H2O%20molecule.jpg

Answer 3

H2O, CO2, O2, H2 and NH3 are molecules not atoms !!

Answer 4

Find a drawing you like, and copy it.

Atoms are invisible so you have a certain amount of artistic license.  For instance, the carbon, oxygen and hydrogen atoms in ball-and-stick models are usually colored even though individual atoms have no such property.

Answer 5

If you mean drawing it as a picture:

First of all,draw a sphere composed by more then 8 spheres,best is blue and red spheres,then,draw 4 rings around it (horizontal,vertical,2 diagonal). then draw one sphere on each ring.