2003 Q 2 Study the information in the table and answer the questions that follow lon Electronic Ionic arrangement radius Na 2.8 0.095 K K 2.8.8 0.133 Mg? 2.8 0.065 Explain why the ionic radius of K* is greater than that of Na* ​

Hence

potassium (k) is 2,8,8,1

sodium (Na) is 2,8,1

potassium will have a higher Ionic radius than sodium

Explanation:

Ionic radius has a trend

it increases down the group

and decreases across the period

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.

            and  

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.