Comments on: O Level Chemistry – Mole Calculation + Organic Chemistry Question

By: mari

mari — Mon, 12 Sep 2011 13:00:11 +0000

plz told me is it correct is it calcium

sean — Thu, 18 Aug 2011 17:33:41 +0000

Ans is (a) since Ca atom loses 2 electrons from its valence shell to form Ca2+ ion

Momina.khan — Fri, 29 Jul 2011 09:39:13 +0000

Which atom loses two electrons from its valence shell to form an ion?
a)calcium
b)carbon
c)chlorine
d)oxygen

sean chua — Thu, 07 Jul 2011 17:17:46 +0000

very good attempt. i agree with answers to a, b and c.

Could you explain how you get your answers of CH4 in part (d)?

sean chua — Thu, 07 Jul 2011 17:14:44 +0000

very good attempt. i agree with answers to a, b and c. check out the answer to (d) in other’s response