Compared to infrared radiation, an electromagnetic wave that has a lower frequency will also have a a. longer wavelength and lower speed b. longer wavelength and equal speed c. shorter wavelength and lower speed d. shorter wavelength and equal speed

Explanation:

One important feature fo electromagnetic radiation is that all have the same speed in vacuum, c, in vacuum, which is the speed of light.

Since, the speed, wavelength and frequency of the waves are related you can infere any of them when the other two are known.

The equation is:

That inverse relation between frequency and wavelength, where the speed is the constant, shows that the lower the frequency the longer the wavelength.

In conclusion, the correct statment is that an an electromagnetic wave that has a lower frequency will also have a longer wavelength and equal speed (option B).

a electronegativity decreases beacuse the size of nucleus is bigger.