An atom has three shells with 3 electrons in the last shell. This atom could be O B
O Al
O Ga
O Si

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

What is the maximum amount of al2(so4)3 which could be formed from 15.84 g of al and 12.89 g of cuso4?

Why are the trends and exceptions to the trends in ionization energy observed?