We can predict the order of the elements given above according from the highest to lowest first ionization energies by using the trends in a periodic table. For elements in a family, the ionization energy decreases as it goes down. Therefore, the correct order would be Be, Mg, Ca, Sr.
Explanation: Ionization energy is defined as the energy which is used to remove an electron from the outermost shell of an element in the gaseous state.
Thus as we move down the group, we can observe that atomic mass is increasing as the number of shells are increasing, thus the outermost shell has less attraction towards the nucleus due to the shielding effect of the penultimate and anti penultimate shells.
Thus the order of the Ionization energy is found to be -
What happens is,that,when a river flows into the ocean it carries some land with it. This land is made up of rocks and soil, which contains minerals. One of these minerals is Salt.
An isotope is a form of a chemical element whose atomic nucleus contains a specific number of neutron s, in addition to the number of proton s that uniquely defines the element. The nuclei of most atom s contain neutrons as well as protons
