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