AM Radio Waves
Ultraviolet Light
X Rays
Visible Light

What is true for ALL of the examples of electromagnetic waves?

They all move at the same speed in a vacuum.

They all have the same wavelength.

They all have the same frequency.

They all have the same energy.

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They all move at the same speed in a vacuum.

Explanation:

All electromagnetic wave travel with the same speed in vacuum. This speed is equivalent to 3x10^8m/s

All electromagnetic wave have different frequencies and wavelengths. The frequency and wavelength are in inverse proportionality i.e as the frequency of a wave increase, its wavelength decreases. The same is also applicable to the energy of waves. Each electromagnetic wave have different energy.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

it's c. elements are placed in rows based on how may valencies electrons have.