What part of the electromagnetic spectrum is known as the infrared region? Express your answer in terms of both frequency (wavenumbers) and wavelength (microns). You may need to consult your text .

Explanation:

Infrared region amplifies from the nominal red edge of the visible spectrum. whose wavelength range from 700 nano-meters (nm) to 1 millimeter (mm). and the range of frequency is from 430 terahertz to 300 GHz.

in EM spectrum infrared region is larger than the visible.

further this region is divided into near-infrared, short wavelength infrared, mid-wavelength infrared, long-wavelength infrared and far infrared.

not clear

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6