Single covalent bonds occur when partially positive ions attract partially negative atoms nearby. Examples include the bond between 2 hydrogen atoms. Ionic bonds occur when atoms are held together by an attraction between negatively and positively charged ____________ . Examples include NaCl and MgCl₂. Single covalent bonds occur when one pair of ____________ is shared between the outer shells of two atoms. Examples include the ____________ . ____________ occur when two pairs of ____________ are shared between the outer shells of two atoms. Examples include the ____________ . Triple covalent bonds occur when three pairs of ____________ are shared between the outer shells of two atoms. Examples include the ____________ .
