Question

Street lights are yellow/orange in color and not white. Based on your flame test data, what gaseous element is present in street lights?

Answer 1

Answer: sodium

Explanation: Because each element has an exactly defined line emission spectrum, scientists are able to identify them by the color of flame they produce. For example, copper produces a blue flame, lithium and strontium a red flame, calcium an orange flame, sodium a yellow flame, and barium a green flame.