Asked by: Marianela Unia
asked in category: General Last Updated: 7th February, 2020

Does a metal or nonmetal ion determine the burn color?

A metal salt consists of a component cation (the metal) and an anion. The anion can affect the result of the flame test. For example, a copper(II) compound with a non-halide produces a green flame, while a copper(II) halide yields a blue-green flame.

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In respect to this, how can you identify a metal using a flame test?

During a flame test, chemists take an unknown metal and put it under a flame. The flame will turn different colors based on which metal is in the substance. The scientists can then identify their unknown substance.

Subsequently, question is, why is it difficult to identify the metal ions from the Colour of the flame? This energy is released as light, with the characteristic flame colours of different metal ions due to varying electron transitions. As stated, these tests work better for some metal ions than other; in particular, those ions shown on the bottom row of the infographic are generally quite faint and hard to distinguish.

Consequently, do all metal ions produce a flame Colour?

Not all metal ions give flame colors. For Group 1 compounds, flame tests are usually by far the easiest way of identifying which metal you have got. For other metals, there are usually other easy methods that are more reliable - but the flame test can give a useful hint as to where to look.

Why do metal ions give flame Colours?

When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.

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