Only Be and Mg form nitrides directly. The second class of metals includes zinc, magnesium, aluminium, cadmium, tin, lead, iron, and the alkali metals, and no nitrous acid is required to start their reaction with nitric acid. According to Divers, nitrous acid is not produced in appreciable amounts, because further reduction occurs which is due to the action of nascent hydrogen: Solution Show Solution. When burned in air, alkaline earth metals will react with nitrogen (as well as with oxygen) to give the corresponding nitride: This is different from the alkali metals, of whom only lithium reacts with N … This group of elements includes beryllium, magnesium, calcium, strontium, barium, and radium.The elements of this group are quite similar in their physical and chemical properties. Reaction with water. This gives a characteristic colour to the flame. Metal hydrides (H-) are given as products. I assume the difference has to do with the lattice energy of the different nitrides. Reactions of the Alkali Metals with air or oxygen. Potassium is more active than sodium because the atomic size of potassium is larger than of sodium. Hydrogen burns in oxygen to form its oxide. reaction for the alkaline earth metals. Sodium nitride exists, but it undergoes the reverse reaction easily: 2 Na3N ---> 6 Na + N2. The s-block elements consist of the elements in which the outermost electrons enter into the s-orbital.These elements are divided into two categories i.e, alkali metals or group 1 elements and alkaline earth metals or group 2 elements. My reasoning is as follows. Reaction with nitrogen. Reaction with oxygen All the alkali metals on exposure to air or oxygen burn vigorously, forming oxides on their surface. The alkaline earth metals are the elements that correspond to group 2 of the modern periodic table. alkali metals are highly reactive towards the more electronegative elements such as oxygen and halogens. Reaction with nitrogen: These metals form nitrides on heating in presence of nitrogen which are hydrolysed by H2O to give ammonia. metal compounds. The reaction product in liquid sodium is sodium cyanide. The alkali metal that reacts with nitrogen directly to form nitride is . Alkaline earth metals react with hydrogen to generate saline hydride that are unstable in water. Some characteristic chemical properties of alkali metals are described blow. The alkali metal that reacts with nitrogen directly to form nitride is . the elements of group (1A) are known as alkali metals because they react with the water forming alkaline solutions. Reactions of alkali metals with oxygen. The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids). Chemistry. CHEMICAL PROPERTIES OF ALKALINE EARTH METALS The chemical reactions of the alkaline earth metals are quite comparable to that of alkali metals. In the remainder of this section, we will examine nitrogen-oxygen chemistry. Because of differences in lattice energy, Li produces the oxide (Li 2 O), the heavier metals (K, Rb, Cs) produce the superoxide (MO 2 ), and Na produces the peroxide (Na 2 O 2 ). Physics. However, it excludes hydrogen because it has nonmetallic properties. Molten lithium ignites in oxygen to form Li 2 O(s); the reaction is accompanied by a bright red flame. Alkali metal, any of the six elements of Group 1 (Ia) of the periodic table—lithium, sodium, potassium, rubidium, cesium, and francium. Actually, one of the alkali metals (lithium) does react with nitrogen: 6 Li + N2 ---> 2 Li3N. Reaction with water: The alkaline earth metals readily react with water giving off hydrogen and forming metal hydroxides. Reaction of Alkali Metals with Oxygen. If it doesn't with which ones does it react/not react (which ever way is easier to state) ? etc). The reaction between alkali metals and nitrogen(IV) oxide might be considered as a reaction between Usanovich Lithium forms only It burns with a pop sound. Alkali Metals React with Oxygen. These metal oxides dissolve in water produces alkalis. They are the most strongly electropositive of the metals. When Lithium reacts with nitrogen gas at room temperature (N2), it forms Lithium Nitride (Li3N) which is stable, because the lattice energy released from the formation of Li3N is high enough to make the overall reaction exothermic. Acids and alkali metals reaction. Reaction with hydrogen. Lithium is unique in Group 1 because it reacts with nitrogen in the air as well as oxygen. 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