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Reactivity science definition pdf#
Reactivity science definition pdf download#

When steam is passed over magnesium metal, magnesium oxide and hydrogen gas are formed. Reaction of Magnesium metal with Water: Magnesium metal reacts with water slowly and forms magnesium hydroxide and hydrogen gas. Reaction of Calcium metal with Water: Calcium forms calcium hydroxide along with hydrogen gas and heat when react with water. Reaction of Sodium metal with Water: Sodium metal forms sodium hydroxide and liberates hydrogen gas along with lot of heat when reacting with water. However, alkali metals react vigorously with water. Most of the metals do not react with water. Metal + Water → Metal hydroxide + Hydrogen Reaction of metals with water: Metals form respective hydroxide and hydrogen gas when reacting with water. Silver, gold and platinum do not combine with the oxygen of air even at high temperature. Reaction of Copper metal with Oxygen: Copper does not react with oxygen at room temperature but when burnt in air, it gives oxide. Alkali metals react vigorously with oxygen. Reaction of Sodium with Oxygen: Sodium metal forms sodium oxide when reacts with oxygen. Reaction of Potassium with Oxygen: Potassium metal forms potassium oxide when reacts with oxygen. Reaction with oxygen: Most of the metals form respective metal oxides when reacting with oxygen.

Colour: Most of the metals are grey in colour.

Density: Most of the metals have a high density.

(Except sodium and potassium metals which have low melting and boiling point.)

Melting and Boiling Point: Metals have generally high melting and boiling points.

Because of this property, a wire is made of metals. This means metals can be drawn into thin wire. Because of this property, iron is used in making big ships. This means metals can be beaten into a thin sheet. This is the cause that electric wires are made of metals like copper and aluminium.

Conduction: Metals are a good conductor of heat and electricity.

This is the cause that metal wires are used in making musical instruments. Sound of metals is also known as Metallic sound.

Sound: Metals produce ringing sound, so, metals are called Sonorous.

State: Metals are solid at room temperature except for mercury (Hg).

(Except Sodium (Na) and potassium (K) which are soft metals). Because of this, big structures are made using metals, such as copper (Cu) and iron (Fe).

Strength: Most of the metals are strong and have high tensile strength.

Hardness: Most of the metals are hard, except alkali metals, such as sodium, potassium, lithium, etc.

Thus, metals are known as Electropositive Elements. Metals are the elements which form positive ions by losing electrons. Examples are Iron (Fe), Aluminium (Al), Silver (Ag), Copper (Cu), Gold (Au), Platinum (Pt), Lead (Pb), Potassium (K), Sodium (Na), Calcium (Ca) and Magnesium (Mg) etc. Metals are the elements that conduct heat and electricity and are malleable and ductile. Metals: Physical properties of metals, chemical properties of metals and non-metal oxide. Metals and Non-metals Class 10 Science Notes Here we have given NCERT Class 10 Science Notes Chapter 3 Metals and Non-metals.Īccording to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks.

Reactivity science definition pdf#

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