Writing the Formula for Carbon Dioxide

In this video we'll write the correct formula for Carbon Dioxide.

To write the formula for Carbon Dioxide we’ll use the Periodic Table and follow some simple rules.
When we have a non-metal and a non-metal we have a molecular compound (sometimes called covalent). Molecular compounds are some of the simplest to name.

Keys for Writing the Formulas for Molecular Compounds:

- Write the element symbol for both elements.
- Place a subscript after each element according to its prefix.

Note: Don’t write the subscript '1'.

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Prefixes
mono- 1
di- 2
tri- 3
tetra- 4
penta- 5
hexa- 6
hepta- 7
octa- 8
nona- 9
deca- 10
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Caution: We only write "mono" for the second element in a molecular compound. So CO would be carbon monoxide. Monocarbon monooxide is incorrect.

For a complete tutorial on naming and formula writing visit:

or watch

Drawing/writing done in InkScape. Screen capture done with Camtasia Studio 4.0. Done on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo).

[IITAspirant]

Maybe some are finding it odd as normally when you make a formula, you have to play with the valencies and then cross their valencies(without the sign) and in this video, some other logic is applied
So I think that's the reason some people are arguing in the comments

[Raghav]

This is the way

SYMBOL :. C. \ / O
VALENCY: 4. / \ 2. (4/2 = 2). MEANS 2 VALENCY WITH CARBON THEN CROSS IT
FORMULA :. CO2
✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ CLASS 9TH SCIENCE

[gauravapril]

Sir please make video on How to write chemical formula of Ca(OH)2 + CO2.🌹🙏🙏🙏🙏🙏

[Ms.M-hd]

I lack 3 years of chemistry foundation but this was so easy to understand, thank you so much

[dreamlordvlogs]

I copied this for my homework because. I forgot what what’s a carbon dioxide

[gioangelo]

No sense haha ithought your going to solve