How to tell if teeth/gums are weak?

how do you tell a strong acid from a weak acid ? and how do you tell a strong base to weak base? detailed plz

...How do you tell if a acid is strong or weak, or if a base is strong or weak?

1.Select all of the following salts that would produce an aqueous solution that was acidic. 1NH4Cl LiNO2 CaCO3 FeCl3 RbI KClO C6H5NH3Br NaCl Al(NO3)3 Na3PO4 Mg(BrO)2 2. Select all of the following ions that would act as a weak base in aqueous solution...

I was reading an article about something and it said, "...this is not for the weak-minded." So I was just wondering, what does it mean to be "weak-minded", exactly? What about strong-minded? How can I tell which one I am?

1. How can I tell if something is an acid or a base? 2. Once that is determined, how can I tell if it is a strong or weak acid/base? Thanks so much!

I have a chemistry exam coming up soon and I still can't tell how you know which acid or base is strong or weak by just looking at their chemical formula. I know that if it has complete ionization, then it's a strong acid. Say I was given a salt like...

1.How would someone know if their teeth are weak??? 2.Would the denist beable to tell by looking at them and or by seeing the xrays of them?? 3.And would the denist tell them???

if we can't see a magnetic field, how can we tell where it is strong and where it is weak? also where is the magnetic field around the earth the strongest??