If a certain radio wave has a wavelength of 4.00 x 10² m, what is the frequency of the wave in Hz​

How many orbitals does the p sub shell container

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Element before carbon on the periodic table