An induced dipole occurs when one molecule with a permanent dipole repels another molecule's electrons, causing the electrons to be more concentrated on one end of the molecule than another.

true
false

True

Explanation:

Dipole-dipole interaction:-

This is the interaction between the two dipoles in the molecule which is formed by varying electronegativities.

Induced dipole-dipole interaction:-

These interactions results between the interactions of a permanent dipole and an induced dipole. The permanent dipole when reaches a molecule's proximity, causes the electrons to pull itself and making it a temporary dipole and thus, results in these kind of interactions.

Hence, the given statement is true.

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.