Flame TestJOHN FLORENTINO E. ECHON

OBJECTIVES

determine the characteristic colors that metal salts emit; and

relate the colors emitted by metal salts to the structure of the atom.

Q1. Why do you think are there different colors emitted?

Q2. What particles in the heated compounds are responsible for the production of the colored light?

Q3. How did the scientists explain the relationship between the colors observed and the structure of the atom?

These colors given off by the vapors of elements can be analyzed with an instrument called

spectroscope

An atomic spectroscope

We call this series of lines the atomic spectrum of the element. The color, number and position of lines produced is called the “fingerprint” of an element. These are all constant for a given element.

Q4. Explain how your observation in Activity 1 relates to Bohr’s model of the atom. You can explain using an illustration.

n = energy level

Excited state of an electron

Q5. Which illustration below represents the energy of the electron as described by Bohr? Explain your answer.

Conclusion

In the Bohr model, electrons are described as occupying fixed energy levels at a certain distance from the nucleus of an atom.