What is the frequency of a radio wave with a wavelength of 3 m? (hint: mhz stands for megahertz or 1 million hertz)
o a. 1 mhz (1 x 106 hz)
o b. 100 mhz (1 * 108 hz)
o c. 10 mhz (1 x 107 hz)
o d. 1000 mhz (1 x 100 hz)

what are the óptions. pléase list them

the only liquid elements at standard temperature and pressure are bromine (br) and mercury (hg). although, elements caesium (cs), rubidium (rb), francium (fr) and gallium (ga) become liquid at or just above room temperature.

explanation:

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

the answer is true.