The frequency of light is necessary to excite an electron in the 1st energy level is 7.56 x 1014 Hz. Calculate the wavelength for this frequency. (SHOW ALL WORK!)

false

because it does not have the potential to be entirely used up

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

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since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.