So, they cannot supply electrons to H+ ions. Non-metals are electron acceptors and hence are electronegative. Ionic or electrovalent bonds are formed under the conditions of low ionization energy, high electron affinity, and high lattice energy. Electron Affinities This is the reverse of ionisation (energy change when an electron is added to an atom/ion. Non-metals: Non-metals form acidic oxides with oxygen of air. It cannot supply electrons to H + and hence, it does not displace hydrogen from dilute acids. Non-metals cannot displace hydrogen from dilute acids. Solution Show Solution Metals are good reducing agent s because they are electron donors Reaction of Non-metals with Chlorine. So, look at the periodic table. Generally, metals displace hydrogen from dilute acids. Ionic bonds require an electron donor, often a metal, and an electron acceptor, a nonmetal. They are electron acceptors. Non-metals can be solids, liquids and even gasses. By losing those electrons, these metals can achieve noble gas configuration and satisfy the octet rule. Metals are electron donors and non-metals are electron acceptors. On the other hand, non-metal is an electron acceptor. When any substance reacts with the acid, it provides electrons, so that H+ ion will be formed. Some non-metals can share electrons and form stable bonds with other atoms. Metals have a tendency to lose electrons and hence they supply electrons, i.e., they are electron donors. 8. 2. So, they do not displace hydrogen from dilute acids. Metals and Non-metals Class 10 Important Questions Long Answer Type. Question 1. 4. Why solid sodium Chloride does not conduct electricity? Ionic bonds occur between metals (electron donors) and non-metals (electron acceptors) because of the electrostatic force of attraction between positive and negative ions. As non - metals do not provide these electrons, they cannot displace hydrogen from acids. Reaction of non metals with water: Non metals do not react with water as to react, they need to displace hydrogen and for displacing, they need to donate electrons to hydrogen but it is not possible as they are themselves electron acceptors. Question 8. Metals are electron donors and hence are electropositive. Chemical properties of Non-metals: 1. 7. That is why metals displace hydrogen from dilute acids. This means metals form positive ions and non-metals form negative ions. Non-metals do not show such displacement reactions. To release H+ from the acid, the non-metal has to provide the extra electron. Non-metals react with chlorine to form covalent chlorides. For example, Generally, metals form ionic bonds. Non-metals themselves are acceptors of electrons. Generally, form both ionic and covalent bonds. ///// chemistry. One exception is hydrogen, but it might in fact be a metal. Ionic bonding is observed because metals have few electrons in their outer-most orbitals. Hence they are unable to displace H+ from the acid to form a salt and release hydrogen gas. 3. Non-metals do not react with dilute acids and don’t displace hydrogen from dilute acids, because non-metals are electron acceptor. It is seen that electron affinities generally increase on crossing the periods (same trend as for IE’s, and for the same reason). LEO goes GER, Loss of electron = oxidation; gain of electron = reduction. Again, the trend is interrupted at Group 15 due to the np3 configuration (spin pairing must occur). The elements to the left tend to donate electrons, because they have less than half a full valence shell. Metals are good _____ (oxidizing agents / reducing agents) because they are electron _____ (acceptors / donors). Hence non-metals are called electron acceptors. Hydrogen is the easy example. Non-metals can not displace hydrogen from acids as, non- metals do not lose electrons radially. 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