Recent content by gxc9800

A_{Z X} means ^{12}_6 C atom here? ^A_{Z+1} Y represent ^{12}_7 C ^+ ion am i right? to find the mass of ^{12}_6 C atom, the mass os 1 electron is subtracted ... why you said that the mass is subtracted to find the mass of ^{12}_5 C ^+ ion?

and i don't understand part 2 ) , why the mass defect is mx -(my[FONT=Tahoma]-me) -me ? the extra orbittin elc\ectron mass is already deducted in the last part -me am i right? why the mass of elctron is deducted again in ( my[FONT=Tahoma]-me )?

Homework Statement from the physics fact in the photo, i know that the daughter nucleus is a positive ion... but , referring to the part 2 , finding the mass loss in beta decay in terms of atomic mass , it says that A_(z+1) Y has extra one orbitting electron comapred to the parent nucleus. this...

Homework Statement in the photo, the 23Na form 24Na Am i right? if i am right, the mass of 23Na should decraese , and mass of 24Na should increase. but why the solution provided is the mass of 24Na decreses and increases at the time of delta t ?? i can't understand Homework EquationsThe...

Homework Statement in my book, it states that the reactivity of haloalkane in ascending order is C6H5CH(CL)CH3 <CH3)3 CCL <C6H5(CH3)2 CL ... this involve formation of carbocation as intermediate , so i the lesser the partial negative charge on C atom during formation of carbocation ,the more...

Homework Statement in the first photo , the direction of x-ray and the atomic plane are shown. whereas for the 2nd photo , the the direction of x-ray and the atomic plane are not shown... so i would assume the glancing angle = 0 . beacuse the atomic plane is [FONT=Georgia]parallel to the x-ray...

i will try my best to understand . i am not sure whether it's the translation or not. but i english is not my first languange...

alright, can you please look at the 2nd photo? i can understand why the mass defect (for atomic mass) is mx -( my[FONT=Trebuchet MS]-me) -me , why not mx -( my[FONT=Trebuchet MS]+me) -me ? before subtracting the mass of the 'extra orbitting electron' , why the mass defect is calculated by...

##^A_{Z+1}Y## represent positive ion am i right? but not ##^A_{Z+1}Y^+## ... the product nuclei has Z+1 proton but the number of electrons remained the same... so for ##^A_{Z+1}Y## , it's a positive ion... am i right? i knew this from the first photo.

please refer to the lower part , it states that |AB|= |AB| cos(\theta)... after eliminate |vector b1 x vector b2|

Homework Statement kindly refer to the yellow highlighted part, why is but not ? Homework EquationsThe Attempt at a Solution

Homework Statement in the first photo of my note , it says that the product nucleus has Z electrons[FONT=Verdana] (not Z+1) electrons , whereas for the 2nd part of my note , it says that the atomic masses of the product nucleus( which has A nucelon mumber and Z+1 proton number) , it has one...

hi,[FONT=Tahoma] When testing the hypothesis, you are comparing the cumulative probability of this sample (at least 8 people), against the claim [FONT=Arial]why the author doesn't say 'the investigator selects a random smaple of 22 people and at most 8 people agree to vote for him ' instead?

Homework Statement Given that 8 person vote for Mr Tan , i can't understand why the probability is sum of 0 people vote for him until 8 people vote for him. Why not the probability = 22c8 ( (0.6)^8 )( (0.4)^14) ? Homework EquationsThe Attempt at a Solution

thanks! question solved!