Which of the following statements correctly compares the relative size of an ion to its neutral atom?

a) the radius of an anion is greater than the radius of its neutral atom.

b) the radius of an anion is identical to the radius of its neutral atom.

c) the radius of a cation is greater than the radius of its neutral atom.

d) the radius of a cation is identical to the radius of its neutral atom.

Option (A) is the correct answer.

Explanation:

When any neutral atom tends to gain an electron then it acquires a negative charge. This means that number of electrons has increased into the atom due to which its atomic radius will also increase.

On the other hand, when an atom tends to lose an electron then it acquires a positive charge. This means that number of electrons has decreases into the atom due to which its atomic radius will also decrease.

Thus, we can conclude that the radius of an anion is greater than the radius of its neutral atom.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.