The electron configuration of Lithium is 1s2 2s1
Answer:
solid
Explanation:
It is called an amorphous solid because it lacks the ordered molecular structure of true solids, and yet its irregular structure is too rigid for it to qualify as a liquid.
Answer:
one of the atoms sharing electrons is more electronegative than the other atom
Explanation:
Mendeleev arranged the elements according to their atomic masses
