Physics, Chemistry and Biology: Post your doubts here!

[shameema]

i dont think u r taking biology 0610?!

na its 9700

 

[Sweet!]

i read that it is purposed that the neurones are not continuous yet still can communicate with each other.
if u got any other explaination plz tell me

yeah thats right! when an impulse reaches it, synapse releases neurotransmitters that stimulates impulse in the next neurone.

 

[Heba A.Moety]

This is an easy way to learn reactivity series of metals:
Poor Silly Boys Can Marry Any Zombi If They Like How Can Mothers Save Pretty Girls?
Potassium
Sodium
Barium
Calcium
Magnesium
Aluminium
Zinc
Iron
Tin
Lead
Hydrogen
Copper
Mercury
Silver
Platinium
Gold
"Hope it Helped"

 

[Sweet!]

This is an easy way to learn reactivity series of metals:
Poor Silly Boys Can Marry Any Zombi If They Like How Can Mothers Save Pretty Girls?
Potassium
Sodium
Barium
Calcium
Magnesium
Aluminium
Zinc
Iron
Tin
Lead
Hydrogen
Copper
Mercury
Silver
Platinium
Gold
"Hope it Helped"

omg that makes it so much easier! thanks a lot

 

[Awesome12]

This is an easy way to learn reactivity series of metals:
Poor Silly Boys Can Marry Any Zombi If They Like How Can Mothers Save Pretty Girls?
Potassium
Sodium
Barium
Calcium
Magnesium
Aluminium
Zinc
Iron
Tin
Lead
Hydrogen
Copper
Mercury
Silver
Platinium
Gold
"Hope it Helped"

or
Please Send Cats, Monkeys, And Zebras In Large Hired Cages. Make Sure Good Padlock

 

[Phoenix Blood]

This is an easy way to learn reactivity series of metals:
Poor Silly Boys Can Marry Any Zombi If They Like How Can Mothers Save Pretty Girls?
"Hope it Helped"

I learnt it like:
Please Stop Calling Me A Crazy Zombi If That Large Hippo Can't Swim Glug!Glug!

 

[Phoenix Blood]

I learnt it like:
Please Stop Calling Me A Crazy Zombi If That Large Hippo Can't Swim Glug!Glug!

Btw, this reactivity seriesis only for metals. Hyrdrogen and Carbon chip in.

 

[Phoenix Blood]

Btw, this reactivity seriesis only for metals. Hyrdrogen and Carbon chip in.

Did I just reply to myself?

 

[Hashi333]

Assalam-o-Alaikum.
Post your Physics, Chemistry and Biology doubts in here and members, along with me will try their best to help you out.

Is there anyone here who does Edexcel physics or chemistry, if so could you please send me your notes ???

 

[Heba A.Moety]

Did I just reply to myself?

it's ok. it happens!

 

[Sweet!]

btw platinum is more reactive than gold right?

 

[Heba A.Moety]

btw platinum is more reactive than gold right?

not sure, some websites give platinum as more reactive while others give gold.(my teacher said it is gold which is more reactive)
anyway i dont think u will need this comparission because both of them are almost non reactive with other metals and are found free in nature.

 

[Sweet!]

not sure, some websites give platinum as more reactive while others give gold.(my teacher said it is gold which is more reactive)
anyway i dont think u will need this comparission because both of them are almost non reactive with other metals and are found free in nature.

oh okay. Thanks!

 

[Heba A.Moety]

for hydrocarbons, when they are touched with a lighted splint do they give clear flame or yellow/blue flame?

 

[Heba A.Moety]

i cant really understand why when carrying an experiment on a flammable liq. well ventilation is needed?

 

[Arwa Hassan Hegazy]

I am Having trouble with the alpha and beta :/ i just cant state the difference?!

 

[Heba A.Moety]

I am Having trouble with the alpha and beta :/ i just cant state the difference?!

alpha is havier and slower than beta and has stronger ionising effect. it is +vely charged while beta is -vely charged. alpha is stopped by a thin sheet of paper it travels to shorter distances compared to beta and is less penetrating.

 

[Heba A.Moety]

are all displacement reactions exothermic and redox?

 

[Heba A.Moety]

hello! how about we form a group discussion for math doubts, I think it would be good

 

[Karim Nabil]

biology doubt!
the ans is b but how ? :/

#solved
but for future doubts you have to visit this thread, as this is only for O-level
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-136#post-749874