Qualification > Sciences
Chemistry Help HERE ONLY !!
~M.J~:
--- Quote from: thukon on May 31, 2009, 05:54:13 am ---A classmate told me a good mnemonic for the reactivity series, but it goes by the first letter of the element
Please- Potassium
Send- Sodium
Lord- Lithium
Charles- Calcium
McClain- Magnesium
A- Aluminium
Zebra- Zinc
If- Iron
The- Tin
Lame- Lead
Horse- Hydrogen
Cannot- Copper
Munch- Mercury
Sweet- Silver
Grass- Gold
No point in adding one for platinum, because it goes at the end anyway. Where does carbon go in this?
@aquarian. In exothermic, more heat is given out than taken in by the reaction. In endothermic, more heat is taken in than given out.
--- End quote ---
addition of carbon and Platinum and its like this
Please- Potassium
Send- Sodium
Lord- Lithium
Charles- Calcium
McClain- Magnesium
A- Aluminium
Cute- Carbon
Zebra- Zinc
If- Iron
The- Tin
Lame- Lead
Horse- Hydrogen
Cannot- Copper
Munch- Mercury
Sweet- Silver
Grass- Gold
Properly- Platinum
nid404:
--- Quote from: Shogun on May 31, 2009, 03:34:15 pm ---ok, i have a question, see:
1) how can i show in caculation tht a substance is in excess?
2)why to make alloys with metal is better than making with non metals?
3)y do sientist believe tht no undiscovered eliment is missing from the periodic table?
and By the way Thanks emi..
--- End quote ---
1) check mole ratio(if u give me a question i might be able to explain)
2)metallic bonding is in layers, forces are non-directional, which makes them malleable. Non-metals do no have layers and are brittle.
3)the elements in a periodic table are arranged according to their increasing atomic numbers. Atomic number increases consecutively with the current elements, there is therefore no missing element in the table.
aquarian93:
i need help wid question 3 c the 2nd part.
chem p3 oct 2008
anyone care to help? i dont get it.
thanks
Ghost Of Highbury:
which variant??
Priceless:
ya shogun....
4 da 1st ques...as nid404 said check mole ratio...da 1 dat has a higher mole no is in excess.
4 ur 2nd n 3rd wues nid404 is completely right..
gud luck 2 evry1 ;)
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