Dipole is defined as A. the separation of charges in a nonpolar bond
B. the separation of charges in a polar bond
C. the separation of charges in an ionic bond
D. the separation of charges in a conjugated bond
E. the separation of charges in a dispersion bond

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.  

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