chemical bonding and structure

ionic compounds
1, what holds the cations (+) and anions (-) together?
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The positively-charged side of the H2O molecules are attracted to the negatively-charged chloride ions and the negatively-charged side of the water molecules are attracted to the positively-charged sodium ions. ... Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.
why poor electrical conductivity for simple molecular structuresneutral particles, no charges, because have full valence shell upon sharing electrons, cannot act as charge-carriers to conduct electricitywhy are covalent molecules electrically neutral meaning their no. of protons= no. of electrons ?non-metals share electrons with each other, not GIVE. so their no. of electrons is not affected. not isotopescan covalent bonding happen in metals? or only non-metalscan only happen between 2 non-metals, ranging from 1-3 covalent bondswhy do metals (metallic structure) have a sea of delocalised electrons? 1, related to their loss of electrons in metals - WHY do metals lose electrons? - based on their group in periodic tableall elements from group I to III have positive charges, meaning that they have given up some of their electrons in order to get a full valence shell. the electrons that they have given up becomes delocalised electrons, forming a sea of free-moving electronshow does the metallic structure (crystal) stay in shape? 1, related to the forces of attractionthe strong electrostatic forces of attraction between the (-) charged delocalised electrons and the metal ion (cation)-ion with (+) charges after losing electronswhy is metallic structure malleable?what happens to ionic compound when electricity passes through them? 1, pertaining to their structure/ element 2, which ions go to the positive terminal of the battery, vice versa?1, they decompose into their elements 2, positive ions go to (-) terminal of battery, negative ions go to (+) terminal of battery