Identify the missing particle in the following reaction: 99 43 Tc \ ___+0 -1 epsilon

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

In water, a strong acid will break down into its component parts. a. completely b. partly c. never in water, a weak base will break down into its component parts. a. completely b. partly c. never

What lessons does the history and study of the periodic table offer to other fields of science, and the pursuit science more generally