WILL MARK BRAINLIEST!! Which example is not an electromagnetic wave?

ultraviolet light

infrared light

ultra high frequency sound

visible light

What are two different ways you could find the value of a? explain these methods.

How to calculate voltage drop in a series circuit

Elements in group viiia (also known as group 18, or the noble gases) have similar properties because they all have a. the same number of electron shells b. full octets c. the same number of valence electrons d. the same number of electrons needed to fill their octet