If an element has 3 valence electrons, how many dots will be in the elements dot diagram?

What happens to an electron during an electron transition? A. The electron gains mass and falls into the nucleus of the atom. B. The electron flows between continuous energy levels when it gains or loses energy. C.

How many grams of dry nh4cl need to be added to 2.50 l of a 0.800 m solution of ammonia, nh3, to prepare a buffer solution that has a ph of 8.53? kb for ammonia is 1.8*10-5. express your answer with the appropriate units?

An atom is the smallest unit of matter. what is the smallest unit of life?

Which of the following is a cause if soil compaction

What trend does the first ionization energy follow, going down the periodic table?

In calcium fluoride, what is the closets noble gas that each ion becomes?

Americium-241 is used in some smoke detectors. it is an alpha emitter with a half-life of 432 years. how long will it take in years for 45.0 % of an am-241 sample to decay?

What is the purpose of forming a scientific hypothesis? It starts a plan to test your idea It provides the answer to your investigation It allows you to prove your idea is correct

N2 + 3h2 2nh3 how many moles of hydrogen are needed to completely react with two moles of nitrogen?

While in Europe, if you drive 119 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 30.0 mi/gal? Assume that 1euro=1.26dollars.