Elements of group 8a of the periodic table are known as the noble gases. determine which of the following properties are characteristic of all naturally occurring noble gases

Answer : The properties of noble gases which usually occurs in Group 8 A periodic table are described below;

i) They have an outer electrons configuration as

ii) Some elements like Ne and Ar does not form a stable chemical compounds.

iii) They have a large ionization energy, He has the largest ionization energy amongst the group.

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.