Because the most important spectral lines of sodium are in the yellow region of the spectrum.
A strong yellow color, from sodium
Sodium ions (Na+, from any sorium salt) produce an yellowish orange colored flame with wavelength averaging at a 589.3 nm (actually two dominant spectral lines very close together at 589.0 and 589.6 nm).
because sodium burns yellow
Sodium ions will glow yellow in the presence of a flame.
The sodium is alkali metal it cannot be easily burn in a small flame
An yellow color, from sodium
yellow
The most important emission wavelength of sodium is in the yellow region.
A strong yellow color, from sodium
Bright yellow :: This is the sodium ions. Any sodium compound will give a flame test colour of yellow/
You get and orange - yellow colour.
Orangish yellow
Sodium ions (Na+, from any sorium salt) produce an yellowish orange colored flame with wavelength averaging at a 589.3 nm (actually two dominant spectral lines very close together at 589.0 and 589.6 nm).
because sodium burns yellow
Sodium ions will glow yellow in the presence of a flame.
Sodium nitrate itself does not burn. It is an oxidizer. It can be used in place of oxygen to burn materials.
The sodium is alkali metal it cannot be easily burn in a small flame