2. Al reaccionar el sodio con el cloro para formar cloruro de sodio lo hacen siempre con la misma proporción de masas:
a) Teoría de Dalton
b) Modelo de J. J. Thomson
c) Modelo de Rutherford
d) Modelo de Bohr

As a part of an experiment a student burns propane to produce carbon dioxide and water she remembers that she must follow the law conservation of matter when writing a balanced chemical equation which of these equation adheres to the law of conservation of matter

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

What three things determine the shape and size of a puddle when water is poured out onto a surface