(brainlest if a actuall answer plz How many protons, neutrons, and electrons are present in the 141 Ce +4 ion plz i will gill

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.