Comments on: Difference between Atom, Molecule & Particle

By: Chaewoo

Chaewoo — Mon, 09 Nov 2009 03:42:33 +0000

We say that a molecule is made up of two or more atoms chemically joined together. Then it means that the atoms are from the same element? (well they can be) but then water H20 is can be a molecule and compound. How do we tell what is a molecule and what is a compound?

and what is a covalent bond?

By: sean

sean — Sat, 31 Oct 2009 16:03:04 +0000

Hi Coty.

I am glad to hear that.

We thank you for your encouraging words.

Feel free to drop us any comments. Cheers!

By: Coty

Coty — Fri, 23 Oct 2009 02:46:34 +0000

Thanks so much for your help! Mole and molecules always confused me but since you put it that way it makes sense now. Just to let you know I made a 94 on my college chem. exam and it was the highest in my class, so you helped a ton!

Thanks again and God bless,
Coty

By: sean

sean — Thu, 15 Oct 2009 04:24:05 +0000

Hi Russell,

This is the basic essential concepts of Chemistry that are causing some junior chemistry students some problem. In Singapore, the Sec 3s (some Sec 2s) are having the same misconceptions on these.

Molecule is NOT THE SAME as Element.

Molecules are made up of 2 or more atoms that are chemically combined together. Element is the “name” that describes the atoms, and the total number of Elements are stated in the Periodic Table.

Hope this information helps. =)

To Your Academic Success in Chemistry,
Sean Chua

By: sean

sean — Thu, 15 Oct 2009 04:15:41 +0000

Hi Coty,

There are different.

The unit of measurement for atoms and molecules is the Mole. The mole is also the S.I. Unit for chemical quantity i.e. how much. The symbol for the mole is mol.

Molecule is a group of 2 or more atoms that are chemically combined together.

Hope this information helps. =)

To Your Academic Success in Chemistry,
Sean Chua