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โจทย์ ปรนัย
q=mg/E when q=charge of electron=-1.6022x10^-18C m=mass of oil g=gravitational force E=Electric field
q=charge of electron=-1.6022x10^-18C
-.50 -.25 +.25 เต็ม 0 -35% +30% +35%
S has 2 extra electron which will make it equal to Ar which is in group 8
s p d f
4A=232-4(4)=216 90-4=86 2B=86-2=84
Alpha decay and beta decay
CO2 has london force
Intermolecular forces
ClO4 is wrong H2O has sharper angle than SO2 SO2 has 1 lone pair not 2
Lewis structure
1)is correct 2)is incorrect. C and D are not covalent bond 3)is incorrect. B has higher boiling point than A
Electron configuration and comparing through periodic table
((19.995)(80)+(20.005)(10))/100
Average atmoic mass
Add mol
Avogardo number
C=m/v
Molarity
Gram volume concentration
M=c/v
โจทย์ อัตนัย
v1/t1=v2/t2
Charle’s law