Terminar cada reacción e indentificar que tipo de reacción es:
2na+cl2

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Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

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?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?