Final answer:
When lithium combines with element E, it will donate its 1 valence electron to element E, forming a compound with the formula LixE.
Step-by-step explanation:
The element E has the electronic configuration 1s2 2s2 2p4, which means it has 6 valence electrons.
Lithium has an electron configuration of 1s2 2s1, meaning it has 1 valence electron.
When lithium combines with element E, it will donate its 1 valence electron to element E. The formula of the compound formed will be LixE, where 'x' is the number of electrons that element E accepts from lithium.