Calculate the number of atoms in a sample containing 3.5 g of silicon atoms

What are the first three quantum numbers for the electrons located in subshell 2s?

Which fact represents evidence for the big bang theory?

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons