How many valence electrons does boron need to be stable?

Vincent graduated from college with a degree in horticulture and now owns a local plant nursery. He maintains a blog titled, "How to Live a Happy Life," and writes that people can lead happier lives by varying the routes they usually take home from

A typical virus is 5x10-6 cm in diameter. if avogadro's number of these virus particles were laid in a row, how many kilometers long would the line be?

How do i calculate the mass of CO2 emitted per Kj of heat produced in a combustion reaction?

What is a solution in chemistry

A sample of concrete contains cement, gravel, crushed rocks, sand, and water. Each of these contains different metals and minerals and hence has different colors and different properties.

Which of the following is an example of potential energy? -none of the above -A person jumping on a trampoline -a book on the shelf -A person running in place

One atom of silicon can properly be combined in a compound with a. three atoms of hydrogen. b. four atoms of calcium. c. two atoms of oxygen. d. one atom of chlorine.

How many carbon atoms are present in a mole of 12C?

What is the formula for copper (II) phosphate? Capitalization and punctuation count. How many atoms of phosphorus are in 7.10 mol of copper (II) phosphate?

What is the formula of barium hydroxide? (chemistry) ?