Definition of expend in the AudioEnglish.org Dictionary. Meaning of expend. What does expend mean? Proper usage and pronunciation (in phonetic transcription) of the word expend. Information about expend in the AudioEnglish.org dictionary, synonyms and antonyms.
Confidence votes 36. Covalent bonds usually form between the electrons in the outer valence of an atom. For study island the answer is nonmetals and nonmetals. Covalent bonds usually form between the electrons in the outer valence of an atom. For study island the answer is nonmetals and nonmetals.
A covalent bond forms between two nonmetals. It involves the sharing of electrons to gain a full valence shell. To determine if a bond is one or the other, look at the electronegativity of the atoms. If the electronegativity difference between two atoms is less than 0.4, the bond is nonpolar (< 5 % ionic character). If the electronegativity difference is between 0.4 and 1.6, the bond is polar covalent (from 5 % to 49 % ionic character).