Comments on: O Levels Chemistry Tips Blog Marathon – Day 4

By: Maisie

Maisie — Sun, 18 Sep 2011 07:14:16 +0000

@sadia
Proton number of helium is not 20. 20 is its nucleon number. Lol.

By: sadia

sadia — Fri, 07 Jan 2011 04:01:47 +0000

Ans 1= Hydrogen because it has one proton and one electron but no neutron
Ans 2=Proton number is 20 after losing 2 protons,the number of protons will be 18
number of protons is equal to number of electrons so number of electrons will be 18
the number of neutrons
Ac nucleon no=30.918 proton no=18
no of neutrons =30.918-18 =12.918
Ans 3 = they have same valence shell s because they belong to group 1.they have same chemical properties also

By: Tomy Arden

Tomy Arden — Tue, 04 Jan 2011 12:42:43 +0000

Can you teach me how to read the Ne-20 ? i dont understand what does that mean. i havent learn this in school but i wanted to know. can you help me ? thankss. i like your site !

By: sadia

sadia — Thu, 04 Mar 2010 10:50:40 +0000

you are doing a good job.well done keep it up.plz send me o level’s solved papers

By: SimpleChemConcepts | O Levels Chemistry Tips Blog Marathon - Day 5

SimpleChemConcepts | O Levels Chemistry Tips Blog Marathon - Day 5 — Tue, 28 Apr 2009 03:25:06 +0000

[...] your set of Mole Calculations Questions FREE!Today, we are going to continue where we left off in Day 4 of “O Levels Chemistry Tips Blog Marathon” on the topic of Atomic [...]