O level chem

Audi SG

Some info regarding element W

Atomic no. - 16

No. of protons - 16

No. of nuetrons - 16

Mass no - 32

Electronic config - 2.8.6

The accurate relative atomic mass of element W is 32.1

Explain why this is not a whole no.

I simply wrote that W has isotopes which have different number of neutrons so its Ar is not a whole no. Dont seem enough to me... 1 mark question according to my friend, but that's the reason i tried to give him.

is that ok? Thanks

dkcx SG

For a 1 mark question that should be enough. If you want to write more, you can just explain that different number of neutrons affects the mass so the average mass is not a whole number

Darkness_hacker99 SG

I feel that it's enough. W has isotopes - true.

Perhaps you can show him how to calculate 32.1. :) It's actually very simple to calculate.

yiha093 SG

%x m = a

%x m = b

b+a / 2 = 32.1

correct? ?

Darkness_hacker99 SG

%x m = a

%x m = b

b+a / 2 = 32.1

correct? ?

yea, you know your stuff well ;)

that's not in the 'O' level syllabus. but *thumbs up*

yiha093 SG

yea, you know your stuff well ;)

that's not in the 'O' level syllabus. but *thumbs up*

huh . u kidding me ?

i do b4 in sec 4 paper sia. wtffff

ItchyArmpit SG

yea, you know your stuff well ;)

that's not in the 'O' level syllabus. but *thumbs up*

yeah i tot that is too...

furyheaven SG

for your info, please do not use element W as a substituting element. cause it stands for tungsten.

regarding your question, for a one mark question it should be sufficient.

as to how to calculate the actual atomic mass, it depends on the relative abundance of the element. for example chlorine, Cl. it is 35.5. it has 75% of its 35 molecular weight isotope and 25% of its 37 molecular weight isotope. so to calculate the representative molecular weight. it is.

(35*0.75+37*0.25) = 35.5

XiiaooBoon SG

for your info, please do not use element W as a substituting element. cause it stands for tungsten.

regarding your question, for a one mark question it should be sufficient.

(35*0.75+37*0.25) = 35.5

wow you gave your first post in 3 years to this topic ! power..

ItchyArmpit SG

wow you gave your first post in 3 years to this topic ! power..

WOW!!!!!!!!!!!