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Metals and Non-metals Class 10 PPT

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 Page 1


m e t a l s
a n d
n o n - m e t a l s
Class-10
Page 2


m e t a l s
a n d
n o n - m e t a l s
Class-10
Metals and non-metals are two broad categories of
elements in the periodic table, distinguished by their
physical and chemical properties. 
Metals and Non-metals
Page 3


m e t a l s
a n d
n o n - m e t a l s
Class-10
Metals and non-metals are two broad categories of
elements in the periodic table, distinguished by their
physical and chemical properties. 
Metals and Non-metals
State: Metals are generally in the solid
state at room temperature, except for
mercury (Hg), which is a liquid.
Hardness: Metals are typically hard, with
exceptions like lithium (Li), potassium (K),
and sodium (Na), which are relatively soft.
Luster: Metals exhibit metallic luster, which
gives them a shiny appearance.
Malleability: Metals can be hammered or
beaten into thin sheets without breaking.
Ductility: Metals can be drawn into wires,
making them ductile.
Physical Properties of Metals
Page 4


m e t a l s
a n d
n o n - m e t a l s
Class-10
Metals and non-metals are two broad categories of
elements in the periodic table, distinguished by their
physical and chemical properties. 
Metals and Non-metals
State: Metals are generally in the solid
state at room temperature, except for
mercury (Hg), which is a liquid.
Hardness: Metals are typically hard, with
exceptions like lithium (Li), potassium (K),
and sodium (Na), which are relatively soft.
Luster: Metals exhibit metallic luster, which
gives them a shiny appearance.
Malleability: Metals can be hammered or
beaten into thin sheets without breaking.
Ductility: Metals can be drawn into wires,
making them ductile.
Physical Properties of Metals
Melting Point: Most metals have high melting points,
except for gallium (Ga) and cesium (Cs), which melt at
low temperatures.
Boiling Point: Metals generally have high boiling points.
Conductivity: Metals are excellent conductors of heat,
with silver (Ag) and copper (Cu) being the best
conductors. However, lead (Pb) and mercury (Hg) are
poor conductors.
Electrical Conductivity: Metals are good conductors of
electricity, with silver (Ag) and copper (Cu) being the
best.
Sonorous: Metals produce sound when beaten.
Physical Properties of Metals
Page 5


m e t a l s
a n d
n o n - m e t a l s
Class-10
Metals and non-metals are two broad categories of
elements in the periodic table, distinguished by their
physical and chemical properties. 
Metals and Non-metals
State: Metals are generally in the solid
state at room temperature, except for
mercury (Hg), which is a liquid.
Hardness: Metals are typically hard, with
exceptions like lithium (Li), potassium (K),
and sodium (Na), which are relatively soft.
Luster: Metals exhibit metallic luster, which
gives them a shiny appearance.
Malleability: Metals can be hammered or
beaten into thin sheets without breaking.
Ductility: Metals can be drawn into wires,
making them ductile.
Physical Properties of Metals
Melting Point: Most metals have high melting points,
except for gallium (Ga) and cesium (Cs), which melt at
low temperatures.
Boiling Point: Metals generally have high boiling points.
Conductivity: Metals are excellent conductors of heat,
with silver (Ag) and copper (Cu) being the best
conductors. However, lead (Pb) and mercury (Hg) are
poor conductors.
Electrical Conductivity: Metals are good conductors of
electricity, with silver (Ag) and copper (Cu) being the
best.
Sonorous: Metals produce sound when beaten.
Physical Properties of Metals
State: Non-metals can exist as solids, liquids, or
gases at room temperature. Examples include
carbon (solid), sulfur (solid), bromine (liquid),
oxygen (gas), hydrogen (gas), and nitrogen (gas).
Hardness: Non-metals are generally soft, with
diamond being an exception as the hardest natural
substance.
Luster: Non-metals do not have metallic luster,
except for iodine crystals, which can appear shiny.
Physical Properties of Non-Metals
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FAQs on PPT: Metals and Non-metals

1. What's the difference between metals and non-metals in terms of physical properties?
Ans. Metals are shiny, malleable, and ductile solids that conduct heat and electricity, while non-metals are usually dull, brittle, and poor conductors. Metals like copper and aluminium are found on the left side of the periodic table, whereas non-metals such as oxygen and sulphur occupy the right side. Understanding these physical characteristics helps identify elements and predict their behaviour in chemical reactions for CBSE Class 10 science exams.
2. Why do metals lose electrons easily but non-metals gain them?
Ans. Metals have fewer valence electrons (usually 1-3) and weak nuclear attraction to these outer electrons, making electron loss energetically favourable. Non-metals possess more valence electrons (usually 5-8) and stronger nuclear pull, so gaining electrons to complete their outer shell is easier. This fundamental difference in electron affinity explains why metals form positive ions (cations) while non-metals form negative ions (anions) during ionic bonding reactions.
3. How do I identify whether an element is a metal or non-metal without looking it up?
Ans. Check its position on the periodic table-metals occupy the left and centre regions, while non-metals are on the right. Test physical properties: metals are typically lustrous, malleable, and conduct electricity; non-metals are usually dull, brittle insulators. Some elements like boron and silicon are metalloids with mixed properties. Refer to PPTs and mind maps on EduRev to visualise the periodic table layout clearly for your exam preparation.
4. Why do metals react with oxygen to form oxides but non-metals form acidic compounds?
Ans. Metallic oxides are basic because metals donate electrons to oxygen, creating ionic bonds with low electronegativity differences. Non-metallic oxides are acidic because non-metals share electrons with oxygen through covalent bonding, producing compounds that dissolve in water to form acids. This reactivity pattern depends on each element's tendency to lose or gain electrons-a core concept for understanding chemical reactions in CBSE syllabuses.
5. What happens when metals and non-metals react together, and why is it important for Class 10?
Ans. Metals and non-metals undergo exothermic reactions forming ionic compounds, where electrons transfer from metal to non-metal atoms. Sodium reacting with chlorine produces sodium chloride; magnesium burning in oxygen yields magnesium oxide. These displacement and combination reactions demonstrate fundamental principles of chemical bonding, oxidation states, and energy release-essential topics frequently appearing in board exams and crucial for understanding material science applications.
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