Helium has the highest ionization energy.
Helium and hydrogen have the smallest values for the first ionization energies. Helium has the lowest first ionization energy due to its stable electron configuration with a full outer shell, while hydrogen has a low ionization energy because it has only one electron in its outer shell.
T he smallest first ionization energyis for lithium.
The smallest class of the periodic table would be the semi-metals, or metalloids. The second biggest group would be the nonmetals. The largest group would be the metals.
No, helium does not have the largest first ionization energy of all the elements. Helium actually has the highest first ionization energy of any element, due to its small atomic size and stable electron configuration.
Aluminum has the smallest first ionization energy among the elements carbon, silicon, aluminum, and boron. This is because aluminum has more shielding effect from inner electron shells, making it easier to remove an electron from the outer shell compared to the other elements listed.
Potassium has the smallest first ionization energy among those elements listed. This is because potassium has the largest atomic size and the weakest attraction between its nucleus and outermost electron, making it easier to remove that electron.
The element with the smallest first ionization energy is Francium, as it is located in Group 1 of the periodic table and has the largest atomic size. Among the elements listed, lithium (Li) would have the smallest first ionization energy as it is closer to the upper right of the periodic table compared to sodium (Na), potassium (K), and rubidium (Rb).
Rb
Francium has the lowest 1st ionization energy. It badly wants to lose that electron. It is extremely energetically favorable. Basically the elements that are in group 1 and are in the lowest periods.
Hydrogen is the first, smallest, and lightest element. It is number 1 in the periodic table of elements.
First stars made the smallest elements, from hydrogen up and progressively larger stars made progressively larger elements
If the first energy level is complete with two electrons, then the elements hydrogen and helium have two elements in their electron configuration. Hydrogen has one electron in its first energy level, while helium has two electrons filling its first energy level.
Fluorine has the largest first ionization energy among the halogens.
Helium has the highest ionization energy.
Helium and hydrogen have the smallest values for the first ionization energies. Helium has the lowest first ionization energy due to its stable electron configuration with a full outer shell, while hydrogen has a low ionization energy because it has only one electron in its outer shell.
Hydrogen has the smallest atoms of any element, as it has only 1 electron in 1 electron shell and 1 proton. This is why it's first on the Periodic Table.