Alkali metals tend to be more reactive than alkaline earth metals because . Alkali metals tend to be more reactive than alkaline earth metals because . alkali metals have lower melting points alkali metals have lower densities alkali metals have greater electron affinities alkali metals have lower ionization energies Alkali metals are not more reactive than alkaline earth metals.

alkali metals have lower ionization energies

Explanation:

Alkali metals tend to be more reactive than alkaline earth metals because alkali metals have lower ionization energies

Alkali metals are metals found in group 1 and examples are Lithium, Sodium and potassium having 1 electron in their outermost shell, Alkali earth metals on the other hand are found in group 2 of the periodic table  and examp-les of which are  Beryllium, magnesium, Calcium  having 2 electrons in their outermost shells

Alkali metals are more reactive  than the alkali earth metal due to the former having a lower ionization energy  as we know , Ionization energy is the lowest energy it takes to remove a mole of electron from a mole of atom in gaseous sate, We can now see that it will take a very small amount to remove  1 valence electron than two valence electrons  and the ability to easily loose electron makes an element more reactive.

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.