Question

chemical properties of metals and nonmetal

Answer 1

Metals chemical property::----

#) Metals produce metal oxide and hydrogen gas while reacting with water.

#) Soluble metal oxides dissolve in water and create metal hydroxide.

#) Not all metals react with water. However, highly reactive metals like sodium and potassium react with water violently and an exothermic reaction takes places where the hydrogen immediately catches fire.

#) Salt and hydrogen are produced when a metal reacts with an acid.

#) Generally, a metal displaces a less reactive metal in a metal salt solution.

Non- metal property:---

#) Usually have 4-8 electrons in their outer shell.

#) Gain or share valence electrons easily.

#) Form oxides that are acidic.

#) Are good oxidizing agents.

#) Have higher electronegativities.







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Answer 2

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• Metals react with oxygen to form corresponding oxides which are basic in nature. The oxides of reactive metals when dissolved in water give base. For example, sodium form sodium oxide $\bf{(Na_2O)}$ which form a base (NaOH) with water.
• The nonmetals react with $\bf{O_2}$ to form acidio oxides. The oxides of nonmetals form acids when dissolved in water. For example, oxide of reactive nonmetals like chlorine form $\bf{Cl_2O_7}$ , which forms strong acid $\bf{(HClO_4)}$with water.
• The oxides of the elements in the center of the main group elements form amphoteric oxides of metals $\bf{(Al_2O_3)}$or neutral or weakly acidic oxides of nonmetal. For example, CO and NO are neutral whereas, $\bf{CO_2}$ is weakly acidic.