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Compare the physical properties of metals and nonmetals.

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How many periods are considered normal periods?

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How does shielding effect decreases the force of electrostatic attractions between nucleus and outermost electrons?

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What is meant by periodic function?

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How can you elaborate atomic size and atomic radius?

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Define long form of periodic table?

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Describe at least two necessary conditions for the formation of a covalent bond?

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Why the ionic compounds have high melting and boiling points?

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What type of elements have tendency of sharing of electrons?

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What type of elements form metallic bonds?

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Why the density of gases is lesser than of liquids?

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Why the size of atom does not increases regularly in a groups?

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What type of attractive forces exist between HCl molecules?

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Why HCl has dipole dipole forces of attraction?

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Which element has the highest electronegativity? Give reason

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Write the trend of atomic size in period and groups?

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How & why the properties of elements repeat after regular intervals?

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Why are ionic compounds easily soluble in water ?

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What is the trend of shielding effect in periods? Give reasons.

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Which state of matter diffuse rapidly? and why?

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