Which of the following is NOT a strong electrolyte? :

Answers:
Na2SO4
KI
CaCl2
LiOH
C6H1206

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

What are the similarities of physical and chemical change ?