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.
Covalent Bonds. In a covalent bond, atoms have the ability to combine, which they do by sharing electrons. They may share a pair of electrons or several pairs depending on the elements involved. In the case of two atoms of fluorine that combine to form a molecule, the bond is covalent. By sharing a pair of electrons, the molecule achieves a state in which each atom has an octet of valence electrons. When two atoms of oxygen form a molecule, they form a covalent bond in which they share two pairs of electrons. Conductivity The difference between covalent and ionic bonds explains why water-based solutions of ionic compounds are conductors, whereas water-based solutions of covalent compounds do not conduct electricity.