Write the unbalanced chemical equation for the following reaction: nitrogen + hydrogen produces
ammonia (NH3)

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)